Hack The Sec-Leading Resource Of Linux Tutorial: Linux-Server

How to Install MongoDB on CentOS 7

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<b style="background-color: transparent; font-family: Georgia, 'Times New Roman', serif; font-size: large; line-height: 28px;">MongoDB</b><span style="background-color: transparent; color: #333333; font-family: Georgia, 'Times New Roman', serif; font-size: medium; line-height: 28px;"> is a <b>NoSQL database</b> intended for storing large amounts of data in document-oriented storage with dynamic schemas. NoSQL refers to a database with a data model other than the tabular format used in relational databases such as MySQL, PostgreSQL, and Microsoft SQL. MongoDB features include: full index support, replication, high availability, and auto-sharding.</span></h1>
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<li><span style="font-family: georgia, 'times new roman', serif; line-height: 28px;"><span style="font-size: medium; text-decoration: none;"><a href="http://www.hackthesec.co.in/2016/01/install-mongodb-244-on-fedora-1817.html" style="text-decoration: none;" target="_blank"><span style="color: red;">Install MongoDB 2.4.4 on Fedora 18/17, CentOS/Red Hat (RHEL) 6.4/5.9</span></a></span></span></li>
<li style="color: #333333;"><a href="http://www.hackthesec.co.in/2016/01/how-to-install-mongodb-32-on-ubuntu.html" style="color: #999999; line-height: 28px; text-decoration: none;" target="_blank"><span style="color: red; font-size: medium;">How to Install MongoDB 3.2 on Ubuntu 14.04, 12.04 and Debian 7</span></a></li>
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<b style="background-color: transparent;"><span style="color: #0b5394; font-family: Roboto Slab;"><span style="font-size: 24px; line-height: 34px;">Step 1: Add the MongoDB Repository</span></span></b></h1>
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<span style="background-color: white;"><span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">Nano Editor is the best for editing i think so i always use nano editor so you can use any kind of editor does not matter.</span></span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 12px; line-height: 15.6000003814697px;">[root@hackthesec]# touch /etc/yum.repos.d/mongodb.repo
[root@hackthesec]# nano /etc/yum.repos.d/mongodb.repo</span></span></pre>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">If you are running a 64-bit system, add the following information to the file you’ve created, using i to insert:</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 12px; line-height: 15.6000003814697px;">[mongodb]
name=MongoDB Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64/
gpgcheck=0
enabled=1</span></span></pre>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">Then exit and save the file with the command :</span></span><span style="color: #333333; font-family: Georgia, 'Times New Roman', serif; font-size: medium; line-height: 19.2000007629395px;"><span style="line-height: 28px;">Ctrl+X after that Y after that Enter Button</span></span></div>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">If you are running a 32-bit system, add the following information to the file you’ve created, using i to insert:</span></span></div>
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name=MongoDB Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/i686/
gpgcheck=0
enabled=1</span></span></pre>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">Then exit and save the file with the command :</span></span><span style="color: #333333; font-family: Georgia, 'Times New Roman', serif; font-size: medium; line-height: 19.2000007629395px;"><span style="line-height: 28px;">Ctrl+X after that Y after that Enter Button</span></span></div>
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<span style="color: #0b5394; font-family: Roboto Slab;"><span style="font-size: 24px; line-height: 34px;">Step 2: Install MongoDB</span></span></h1>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">As a matter of best practice we’ll update our packages:</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 12px; line-height: 15.6000003814697px;">[root@hackthesec]# yum -y update</span></span></pre>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">At this point, installing MongoDB is as simple as running just one command:</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 12px; line-height: 15.6000003814697px;">[root@hackthesec.co.in]# yum -y install mongodb-org mongodb-org-serve</span></span></pre>
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<span style="color: #0b5394; font-family: Roboto Slab;"><span style="font-size: 24px; line-height: 34px;">Step 3: Get MongoDB Running</span></span></h1>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">Start-Up MongoDB</span></span></div>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">Check MongoDB Service Status</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 12px; line-height: 15.6000003814697px;">systemctl status mongod</span></span></pre>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">Summary List of Status Statistics (Continuous)</span></span></div>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">Summary List of Status Statistics (5 Rows, Summarized Every 2 Seconds)</span></span></div>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">Enter the MongoDB Command Line</span></span></div>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">By default, running this command will look for a MongoDB server listening on port 27017 on the localhost interface.</span></span></div>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">If you’d like to connect to a MongoDB server running on a different port, then use the –port option. For example, if you wanted to connect to a local MongoDB server listening on port 22222, then you’d issue the following command:</span></span></div>
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<span style="color: #333333; font-family: Georgia, Times New Roman, serif; font-size: medium;"><span style="line-height: 28px;">Shutdown MongoDB</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 12px; line-height: 15.6000003814697px;"><a href="http://www.hackthesec.co.in/" target="_blank">Hack The Security</a>
<a href="https://www.twitter.com/hackthesecurity" target="_blank">Hack The Security Twitter</a></span></span></pre>
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How to Install MongoDB on CentOS 7

MongoDB is a NoSQL database intended for storing large amounts of data in document-oriented storage with dynamic schemas. NoSQL refers ...

Install MongoDB 2.4.4 on Fedora 18/17, CentOS/Red Hat (RHEL) 6.4/5.9

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<b style="background-color: white; color: #0b5394; font-family: 'Roboto Slab'; font-size: 24px; line-height: 34px;">What is MongoDB?</b></h1>
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MongoDB (from “humongous”) is a scalable, high-performance, open source, schema-free, document-oriented database. Written in C++. MongoDB bridges the gap between key-value stores (which are fast and highly scalable) and traditional RDBMS systems (which provide structured schemas and powerful queries).</div>
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<ul style="text-align: left;">
<li><span style="color: red; font-family: verdana, geneva, sans-serif; font-size: large; line-height: 28px;"><a href="http://www.hackthesec.co.in/2016/01/how-to-install-mongodb-on-centos-7.html" target="_blank">How to Install MongoDB On Centos 7</a></span></li>
<li><span style="font-family: "verdana" , "geneva" , sans-serif; line-height: 28px;"><a href="http://www.hackthesec.co.in/2016/01/how-to-install-mongodb-32-on-ubuntu.html" target="_blank"><span style="color: red; font-size: large;">How to Install MongoDB 3.2 on Ubuntu 14.04, 12.04 and Debian 7</span></a></span><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7gaIANrdIvsqhNht8owz9p7Tbv2eM-xWNyg2KPWD-fXYRIeEMelqUQziD1iA1IQmM7y3BCabz7bWFDIDbES-9PRTZNv26jUa1HN27CROEmLDgW7DNRdPlTGqx-LiWub58g-Hh-69YSyo8/s1600/mongoDB_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em; text-align: center;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7gaIANrdIvsqhNht8owz9p7Tbv2eM-xWNyg2KPWD-fXYRIeEMelqUQziD1iA1IQmM7y3BCabz7bWFDIDbES-9PRTZNv26jUa1HN27CROEmLDgW7DNRdPlTGqx-LiWub58g-Hh-69YSyo8/s1600/mongoDB_www.hackthesec.co.in.png" /></a></li>
</ul>
</div>
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MongoDB is very interesting document-oriented database, because it has really awesome features:</div>
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<ul style="text-align: left;">
<li>Document-oriented storage (the simplicity and power of JSON-like data schemas)</li>
<li>Dynamic queries</li>
<li>Full index support, extending to inner-objects and embedded arrays</li>
<li>Query profiling</li>
<li>Fast, in-place updates</li>
<li>Efficient storage of binary data large objects (e.g. photos and videos)</li>
<li>Replication and fail-over support</li>
<li>Auto-sharding for cloud-level scalability</li>
<li>MapReduce for complex aggregation</li>
<li>Commercial Support, Training, and Consulting</li>
</ul>
</div>
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This guide shows howto install MongoDB 2.4.4 on Fedora 18/17/16/15/14/13/12, CentOS 6.4/6.3/6.2/6.1/6/5.9 and Red Hat (RHEL) 6.4/6.3/6.2/6.1/6/5.9. Using MongoDB own YUM repositories. Fedora / CentOS / Red Hat (RHEL) RPM packages are currently available for x86 (32-bit) and x86_64 (64-bit) architectures.</div>
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<span style="color: #0b5394; font-family: "roboto slab";"><span style="font-size: 24px; line-height: 34px;"><b>Add and enable 10gen MongoDB repository</b></span></span></div>
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<span style="font-family: "georgia" , "times new roman" , serif; font-size: large;"><span style="line-height: 28px;"><span style="color: #333333;">Select suitable repo for your system and add one of following to</span><span style="color: red;"> /etc/yum.repos.d/10gen-mongodb.repo</span><span style="color: #333333;">.</span></span></span></div>
<div style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="color: #333333; font-family: "georgia" , "times new roman" , serif; font-size: large;"><span style="line-height: 28px;">Mongodb-repo for i686 (32-bit)</span></span></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "verdana" , "geneva" , sans-serif; font-size: 12px; line-height: 15.6000003814697px;">[10gen]
name=10gen Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/i686
gpgcheck=0</span><span style="color: #333333; font-family: "georgia" , "times new roman" , serif;"><span style="font-size: 16px; line-height: 28px; white-space: normal;">
</span></span></pre>
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<span style="color: #333333; font-family: "georgia" , "times new roman" , serif; font-size: large;"><span style="line-height: 28px;">Mongodb-repo for x86_64 (64-bit)</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 12px; line-height: 15.6000003814697px;">[10gen]
name=10gen Repository
baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64
gpgcheck=0</span></span></pre>
</div>
<h5 class="heading2" style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: normal; margin: 0px 0px 8px; opacity: 1; outline: 0px; padding: 0px; vertical-align: baseline; visibility: visible;">
<div>
<span style="color: #0b5394; font-family: "roboto slab";"><span style="font-size: 24px; line-height: 34px;">Install mongo server and mongo client packages</span></span></div>
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<span style="color: #333333; font-family: "georgia" , "times new roman" , serif;"><span style="font-size: 16px; font-weight: normal; line-height: 28px;">Install stable version of MongoDB.</span></span></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 12px; font-weight: normal; line-height: 15.6000003814697px;">yum install mongo-10gen mongo-10gen-server</span></span></pre>
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<span style="color: #0b5394; font-family: "roboto slab";"><span style="font-size: 24px; line-height: 34px;">Configure MongoDB Database Server</span></span></div>
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<span style="color: #333333; font-family: "georgia" , "times new roman" , serif;"><span style="font-size: 16px; font-weight: normal; line-height: 28px;">FEdit /etc/mongod.conf file:</span></span></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 12px; font-weight: normal; line-height: 15.6000003814697px;">nano -w /etc/mongod.conf</span></span></pre>
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<span style="color: #0b5394; font-family: "roboto slab";"><span style="font-size: 24px; line-height: 34px;">Check and set basic settings, before starting MongoDB (default settings are good)</span></span></div>
<div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; font-weight: normal; line-height: 15.6000003814697px;">logpath=/var/log/mongo/mongod.log
port=27017
dbpath=/var/lib/mongo</span></span><span style="color: #0b5394; font-family: "roboto slab";"><span style="font-size: 24px; line-height: 34px; white-space: normal;">
</span></span></pre>
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<span style="color: #0b5394; font-family: "roboto slab";"><span style="font-size: 24px; line-height: 34px;">Start MongoDB Server</span></span></div>
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<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; font-weight: normal; line-height: 15.6000003814697px;">[root@hackthesec]# service mongod start
## OR ##
</span></span><span style="color: white; font-size: 12px; font-weight: normal; line-height: 15.6000003814697px;">[root@hackthesec]# </span><span style="color: white;"><span style="font-size: 12px; font-weight: normal; line-height: 15.6000003814697px;">/etc/init.d/mongod start
</span></span><span style="color: white; font-size: 12px; font-weight: normal; line-height: 15.6000003814697px;">[root@hackthesec]# </span><span style="color: white; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 12px; font-weight: normal; line-height: 15.6000003814697px;">chkconfig --levels 235 mongod on</span><span style="font-size: 12px; font-weight: normal; line-height: 1.3em;">
</span></span></pre>
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<span style="color: #0b5394; font-family: "roboto slab"; font-size: 24px; font-weight: bold; line-height: 34px;">Start MongoDB Server</span></div>
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<div style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; color: #333333; font-family: Verdana, Geneva, sans-serif; font-size: 16px; font-weight: normal; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "georgia" , "times new roman" , serif;">Open MongoDB Command Line Client</span><span style="font-family: "georgia" , "times new roman" , serif;">.</span><span style="font-family: "georgia" , "times new roman" , serif;">.</span></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; font-family: Verdana, Geneva, sans-serif; font-size: 12px; font-weight: normal; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="line-height: 1.3em;">[root@hackthesec]#</span> mongo
> use test
switched to db test
> db.foo.find()
> db.foo.save({a: 1})
> db.foo.find()
{ "_id" : ObjectId("4b8ed53c4f450867bb35a1a9"), "a" : 1 }
> db.foo.update( {a: 1}, {a: 5})
> db.foo.find()
{ "_id" : ObjectId("4b8ed53c4f450867bb35a1a9"), "a" : 5 }
 </pre>
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<div>
<span style="color: #0b5394; font-family: "roboto slab";"><span style="font-size: 24px; line-height: 34px;">Open MongoDB Port (27017) on Iptables Firewall (as root user again)</span></span></div>
<div>
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<span style="color: #333333; font-family: "georgia" , "times new roman" , serif;"><span style="font-size: 16px; font-weight: normal; line-height: 28px;">Edit /etc/sysconfig/iptables file:</span></span></div>
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white; font-family: "verdana" , "geneva" , sans-serif; font-size: 12px; font-weight: normal; line-height: 1.3em;">[root@hackthesec]#</span><span style="color: white; font-family: "verdana" , "geneva" , sans-serif;"><span style="font-size: 12px; font-weight: normal; line-height: 1.3em;"> nano -w /etc/sysconfig/iptables

Add following line before COMMIT:
</span><span style="font-size: 12px; font-weight: normal; line-height: 15.6000003814697px;">-A INPUT -m state --state NEW -m tcp -p tcp --dport 27017 -j ACCEPT</span><span style="font-size: 12px; font-weight: normal; line-height: 1.3em;">
</span></span></pre>
<div style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="color: #333333; font-family: "georgia" , "times new roman" , serif;"><span style="font-size: 16px; font-weight: normal; line-height: 28px;">Restart Iptables Firewall</span></span></div>
<div style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<pre style="background-attachment: scroll; background-clip: initial; background-color: #3c3c3c; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; font-family: Verdana, Geneva, sans-serif; font-size: 12px; font-weight: normal; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="line-height: 1.3em;">[root@hackthesec]#</span> service iptables restart
## OR ##
<span style="font-family: "verdana" , "geneva" , sans-serif; line-height: 1.3em;">[root@hackthesec]# </span>/etc/init.d/iptables restart
</pre>
<div style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="color: red; font-family: "georgia" , "times new roman" , serif;"><span style="font-size: 16px; font-weight: normal; line-height: 28px;">Note: Open MongoDB port only if you have enabled authentication or operating trusted environment.</span></span></div>
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<div>
<span style="color: #0b5394; font-family: "roboto slab";"><span style="font-size: 24px; line-height: 34px;">Test remote connection</span></span></div>
<div style="color: #333333; font-family: Verdana, Geneva, sans-serif; font-size: 12px; font-weight: normal; line-height: 19.2000007629395px;">
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="line-height: 1.3em;">[root@hackthesec]#</span> mongo server:port/database
## Example ##
<span style="font-family: "verdana" , "geneva" , sans-serif; line-height: 1.3em;">[root@hackthesec]# </span>mongo 10.0.10.45:27017/test
</pre>
<div style="border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; font-size: 0.9em; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><a href="htttp://www.hackthesec.co.in" target="_blank">Hack The Security</a>
<a href="https://www.twitter.com/hackthesecurity" target="_blank">Hack The Sec Twitter</a></pre>
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Install MongoDB 2.4.4 on Fedora 18/17, CentOS/Red Hat (RHEL) 6.4/5.9

What is MongoDB? MongoDB (from “humongous”) is a scalable, high-performance, open source, schema-free, document-oriented database. Wri...

How To Install Memcached with PHP on Ubuntu 14.04 /12.04 LTS

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<h2 class="title single-title title20" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 28px; line-height: 38px; margin: 0px 0px 5px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;">
<i><span style="color: #cc0000;">How To Install Memcached with PHP on Ubuntu 14.04 /12.04 LTS</span></i></h2>
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<a href="http://memcached.org/" style="background-color: white; font-family: 'Roboto Slab'; font-size: 16px; line-height: 28px; outline: none; text-decoration: none; transition: all 0.25s linear;" target="_blank"><span style="color: red;">Memcached</span></a><span style="background-color: white; font-size: 16px; line-height: 28px;"><span style="color: red; font-family: "roboto slab";"> </span><span style="font-family: "arial" , "helvetica" , sans-serif;">is a distributed memory object caching system which stored data in memory on key-value basis. It is very useful for optimizing dynamic websites and enabled speed by caching objects in memory. This article will help you to install Memcached with PHP Memcache PECL extension on Ubuntu 14.10, 14.04 and 12.04 systems.</span></span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyPYyu0WTtiKaVH1LWipBc4rR3VCOjh7hOm_aC4IokvVnzO_H3f_4bZHILUzD-KEoSLNArKVE4CxJT82_DvZueY7j65NoS2G31tE5_zuGBqxKx4MbipdioW3OXEJXZXnxAD81Ss06fymRi/s1600/memcached_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyPYyu0WTtiKaVH1LWipBc4rR3VCOjh7hOm_aC4IokvVnzO_H3f_4bZHILUzD-KEoSLNArKVE4CxJT82_DvZueY7j65NoS2G31tE5_zuGBqxKx4MbipdioW3OXEJXZXnxAD81Ss06fymRi/s1600/memcached_www.hackthesec.co.in.png" /></a></div>
<h2 class="heading1" style="background-color: white; border: 0px; margin: 45px 0px 12px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;">
<ul style="text-align: left;">
<li><span style="color: #0b5394; font-family: "roboto slab"; line-height: 34px;"><a href="http://www.hackthesec.co.in/2016/01/how-to-install-memcached-with-php-on.html" target="_blank"><span style="font-size: large;">How To Install Memcached with PHP on CentOS/RHEL 7/6/5</span></a></span></li>
</ul>
<span style="color: #0b5394; font-family: "roboto slab"; font-weight: bolder; line-height: 34px;">Install Memcached Service</span></h2>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">First we recommended to update your system with latest packages.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">$ sudo apt-get update
</pre>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Now use following command to install memcached service on your system.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">$ sudo apt-get install memcached
</pre>
<h2 class="heading1" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 24px; font-weight: bolder; line-height: 34px; margin: 45px 0px 12px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;">
<span style="color: #0b5394;">Install PHP with Memcached Support</span></h2>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Now we are going to install php with few more required packages for setup. We also need to install Memcache module for php using below commands.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">$ sudo apt-get install php5 php5-dev php-pear php5-memcached

$ sudo apt-get install libmemcached-dev build-essential<span style="font-size: 0.9em;">
</span></pre>
<h2 class="heading1" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 24px; font-weight: bolder; line-height: 34px; margin: 45px 0px 12px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;">
<span style="color: #0b5394;">Install Memcache PHP Extension</span></h2>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Finally install Memcache php extension using PECL to finish setup.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">$ sudo pecl install memcache
</pre>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Now enable memcache support in php. Before creating a new file just make sure there are no php memcache configuration file available. If file already exists just skip below command.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">$ echo "extension=memcache.so" > /etc/php5/apache2/conf.d/20-memcache.ini
</pre>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">After doing every think just restart your Apache service.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">$ sudo service apache2 restart
</pre>
<h2 class="heading1" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 24px; font-weight: bolder; line-height: 34px; margin: 45px 0px 12px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;">
<span style="color: #0b5394;">Verify Memcache Setup</span></h2>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Use following command to check and verify that memcached service is running fine.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">root@hackthesec:~$ echo "stats settings" | nc localhost 11211

STAT maxbytes 67108864
STAT maxconns 1024
STAT tcpport 11211
STAT udpport 11211
STAT inter 127.0.0.1
STAT verbosity 0
STAT oldest 0
STAT evictions on
STAT domain_socket NULL
STAT umask 700
STAT growth_factor 1.25
STAT chunk_size 48
STAT num_threads 4
STAT num_threads_per_udp 4
STAT stat_key_prefix :
STAT detail_enabled no
STAT reqs_per_event 20
STAT cas_enabled yes
STAT tcp_backlog 1024
STAT binding_protocol auto-negotiate
STAT auth_enabled_sasl no
STAT item_size_max 1048576
STAT maxconns_fast no
STAT hashpower_init 0
STAT slab_reassign no
STAT slab_automove 0
END
<span style="font-size: 0.9em;">
</span></pre>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Now check if Memcache php extension is enabled and working properly. Create a <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-size: inherit; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">info.php</span> file using following code</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><?php
  phpinfo();
?><span style="font-size: 0.9em;">
</span></pre>
<div class="separator" style="clear: both;">
</div>
<div style="background-color: white; border: 0px; color: #555555; font-family: 'Roboto Slab'; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<a href="http://tecadmin.net/wp-content/uploads/2015/03/php-memcache.png" style="color: #ff8800; outline: none; text-decoration: none; transition: all 0.25s linear;"></a></div>
<br />
<div style="-webkit-text-stroke-width: 0px; background-color: white; border: 0px; font-size: 16px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 28px; margin: 0px 0px 20px; orphans: auto; outline: 0px; padding: 0px; text-align: start; text-indent: 0px; text-transform: none; vertical-align: baseline; white-space: normal; widows: 1; word-spacing: 0px;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Now access info.php on web interface and search for Memcache, You will get result like below.</span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGfkm2d1SWCGbNfq5Ms7-E2LJ5z1PSlunrzq-pkLnHgxnsjEJwVTsC3jCTofvaq89_U413TgG6-RR6UC04dexDbEJx-P3Ruz_rSaD3rLEJpi_MrC3_E-aK1W8Q75xMiC1QLqcOfCPccUdH/s1600/php-memcache_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="338" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhGfkm2d1SWCGbNfq5Ms7-E2LJ5z1PSlunrzq-pkLnHgxnsjEJwVTsC3jCTofvaq89_U413TgG6-RR6UC04dexDbEJx-P3Ruz_rSaD3rLEJpi_MrC3_E-aK1W8Q75xMiC1QLqcOfCPccUdH/s640/php-memcache_www.hackthesec.co.in.png" width="640" /></a></div>
<div>
<span style="background-color: white; font-size: 16px; line-height: 28px;"><span style="font-family: "arial" , "helvetica" , sans-serif;"><a href="http://www.hackthesec.co.in/" style="font-family: 'roboto slab';" target="_blank">Hack The Security</a></span></span></div>
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How To Install Memcached with PHP on Ubuntu 14.04 /12.04 LTS

How To Install Memcached with PHP on Ubuntu 14.04 /12.04 LTS Memcached is a distributed memory object caching system which stored data...

How To Install Memcached with PHP on CentOS/RHEL 7/6/5

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<h2 class="title single-title title20" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 28px; line-height: 38px; margin: 0px 0px 5px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;">
<span style="color: #cc0000;"><i><u>How To Install Memcached with PHP on CentOS/RHEL 7/6/5</u></i></span></h2>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<a href="http://memcached.org/" style="font-family: Arial, Helvetica, sans-serif; outline: none; text-decoration: none;" target="_blank"><span style="color: blue;">Memcached</span></a><span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="color: blue;"> </span>is a distributed memory object caching system which stored data in memory on key-value basis. It is very useful for optimizing dynamic websites and enabled speed by caching objects in memory. </span><a href="http://memcached.org/about" target="_blank">Read more</a><span style="font-family: "arial" , "helvetica" , sans-serif;"> about memcache.</span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_L0t796Hr2w9wlMN-LlqQTC7s0k3_GLTiVufILjs-NF9XDpXUpVMj2Puh7ujTzLU8lmkR81kbtM2fZzkAIqCiRqTRMZ7caAN-BvN8hdunZB2r0yFMJ-18XTnGuZMWmB1rxzAy91lJwIPj/s1600/memcached_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_L0t796Hr2w9wlMN-LlqQTC7s0k3_GLTiVufILjs-NF9XDpXUpVMj2Puh7ujTzLU8lmkR81kbtM2fZzkAIqCiRqTRMZ7caAN-BvN8hdunZB2r0yFMJ-18XTnGuZMWmB1rxzAy91lJwIPj/s1600/memcached_www.hackthesec.co.in.png" /></a></div>
<div>
<span style="color: black; font-family: "arial" , "helvetica" , sans-serif;"><span style="background-color: white; line-height: 28px;"><br /></span></span></div>
<div>
<div style="background-color: white; border: 0px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">This article will help you to install Memcached and PHP Memcache extension on CentOS/RHEL 7/6/5 systems.</span></div>
<div style="background-color: white; border: 0px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
</div>
<ul style="text-align: left;">
<li><span style="font-family: "arial" , "helvetica" , sans-serif; line-height: 28px;"><a href="http://www.hackthesec.co.in/2016/01/how-to-install-memcached-with-php-on_26.html" target="_blank"><span style="font-size: large;">How To Install Memcached with PHP on Ubuntu 14.04 /12.04 LTS</span></a></span></li>
</ul>
<br />
<div style="background-color: white; border: 0px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="color: #0b5394; font-family: "roboto slab"; font-size: 24px; font-weight: bolder; line-height: 34px;">Install Memcached Server</span></div>
<div style="background-color: white; border: 0px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">First we will install Memcached server on our system. Use following command to install memcached using yum package manager.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"># yum install memcached </pre>
<div style="background-color: white; border: 0px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Now start Memcached service using following commands.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><orange style="color: orange;">For CentOS/RHEL 7</orange>
# systemctl enable memcached
# systemctl start memcached

<orange style="color: orange;">For CentOS/RHEL 6/5</orange>
# service memcached start
# chkconfig memcached on<span style="font-size: 0.9em;">
</span></pre>
<h2 class="heading1" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 24px; font-weight: bolder; line-height: 34px; margin: 45px 0px 12px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;">
<span style="color: #0b5394;">Install PHP with Memcache PHP Extension</span></h2>
<div style="background-color: white; border: 0px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Now we have installed Memcached server on our system. But to use Memcached service using php scripts we need to install Memcache php extension. So first install php and other required php modules and then use PECL to install PHP Memcache extension using following commands.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"># yum groupinstall "Development tools"
# yum install zlib zlib-devel
# yum install php php-devel php-pear<span style="font-size: 0.9em;">  </span></pre>
<div style="background-color: white; border: 0px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">After installing php-pear package install PECL extension using command below.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"># pecl install memcache </pre>
<div style="background-color: white; border: 0px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Now we need to enable memcache module in php. Add following line at end of </span><span style="border: 0px; font-family: "arial" , "helvetica" , sans-serif; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">php.ini</span><span style="font-family: "arial" , "helvetica" , sans-serif;"> file.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"># echo "extension=memcache.so" >> /etc/php.d/memcache.ini
</pre>
<div style="background-color: white; border: 0px; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Restart Apache service to enable extension</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><orange style="color: orange;">For CentOS/RHEL 7</orange>
# systemctl restart httpd

<orange style="color: orange;">For CentOS/RHEL 6/5</orange>
# service httpd restart<span style="font-size: 0.9em;">
</span></pre>
<h2 class="heading1" style="background-color: white; border: 0px; font-family: 'Roboto Slab'; font-size: 24px; font-weight: bolder; line-height: 34px; margin: 45px 0px 12px; opacity: 1; outline: 0px; padding: 0px; transition: opacity 0.24s ease-in-out; vertical-align: baseline; visibility: visible;">
<span style="color: #0b5394;">Verify Memcache Setup</span></h2>
<div style="background-color: white; border: 0px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Use following command to check and verify that memcached service is running fine.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">root@hackthesec:~$ echo "stats settings" | nc localhost 11211

</span></pre>
<div style="background-color: white; border: 0px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Now check if memcache php extension is enabled and working properly. Create a <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">info.php</span> file using following code</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><?php
  phpinfo();
?><span style="font-size: 0.9em;">
</span></pre>
<div style="background-color: white; border: 0px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;">Now access info.php on web interface and search for Memcache, You will get result like below.</span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixG5MZ0PNsX1qbW1XlKHl5kPNckcMdoGq-eHZHy3h91mJyrbfRDwjDAxRDRGSKEb9-x0jCDd9FZXCL3iJMKL_eHoX-lwc9kMFAngx5ZCmWG86yKYFL4OREsXNdygD06LBUkwgK3YZj4qW5/s1600/php-memcache_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="338" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixG5MZ0PNsX1qbW1XlKHl5kPNckcMdoGq-eHZHy3h91mJyrbfRDwjDAxRDRGSKEb9-x0jCDd9FZXCL3iJMKL_eHoX-lwc9kMFAngx5ZCmWG86yKYFL4OREsXNdygD06LBUkwgK3YZj4qW5/s640/php-memcache_www.hackthesec.co.in.png" width="640" /></a></div>
<div style="background-color: white; border: 0px; color: #555555; font-family: 'Roboto Slab'; font-size: 16px; line-height: 28px; margin-bottom: 20px; outline: 0px; padding: 0px; vertical-align: baseline;">
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How To Install Memcached with PHP on CentOS/RHEL 7/6/5

How To Install Memcached with PHP on CentOS/RHEL 7/6/5 Memcached is a distributed memory object caching system which stored data in me...

How To Enable or Disable CGI Scripts in Apache 2.4

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<span style="color: #990000;">How To Enable or Disable CGI Scripts in Apache 2.4</span></h2>
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<span style="font-family: Georgia, Times New Roman, serif;">Apache Module <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;"><span style="color: red;">mod_cgi/mod_cgid</span></span> is responsible for handling of CGI Scripts. for worker and event multi-threaded MPM uses cgi daemon “mod_cgid” module. This tutorial will help you to how to enable or disable CGI script in Apache 2.4 server on Linux operating systems.</span></div>
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<span style="color: #0b5394; font-family: 'Roboto Slab'; font-size: 24px; font-weight: bolder; line-height: 34px;">1. Enable CGI Module in Apache</span></div>
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<span style="font-family: Georgia, Times New Roman, serif;">To enable CGI in your Apache server. you need to Load module file <span style="color: red;"><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">mod_cgi.so</span> or <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">mod_cgid.so </span></span>in your Apache configuration file.</span></div>
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<span style="color: #0b5394;">CentOS, RHEL & Fedora Users –</span></h3>
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<span style="font-family: Georgia, Times New Roman, serif;">On CentOS, Red Hat, Fedora and other rpm based distributions edit<span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">/etc/httpd/conf.modules.d/XX-cgi.conf</span> configuration file and make sure below showing lines are not commented.</span></div>
<pre class="pretty" style="background: none 0px 0px repeat scroll rgb(240, 240, 240); border-left-color: rgb(116, 183, 63); border-left-width: 3px; border-radius: 5px; border-style: none none none solid; line-height: 1.5em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 8px 20px 8px 18px; vertical-align: baseline;"><IfModule mpm_worker_module>
   LoadModule cgid_module modules/mod_cgid.so
</IfModule>
<IfModule mpm_event_module>
   LoadModule cgid_module modules/mod_cgid.so
</IfModule>
<IfModule mpm_prefork_module>
   LoadModule cgi_module modules/mod_cgi.so
</IfModule><span style="font-size: 0.9em;">

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<span style="color: #0b5394;">Ubuntu, Debian & LinuxMint Users –</span></h3>
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<span style="font-family: Georgia, Times New Roman, serif;">Ubuntu, Debian, LinuxMint and other Debian derivatives use following command to enable CGI module. This command creates a soft links of module configuration file to <b>/etc/apache2/mod-enabled/</b> directory.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">$ sudo a2enmod cgi
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<span style="font-family: Georgia, Times New Roman, serif;">After enabling CGI modules in Apache configuration you need to restart Apache service on your system for changes take effect.</span></div>
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<span style="color: #0b5394;">2. Disable CGI Module in Apache</span></h2>
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<span style="font-family: Georgia, Times New Roman, serif;">We recommend to keep CGI disabled on your server until its recommended for your server. CGI scripts are are used by hackers to attack on servers. Use below options to disable cgi script on your Apache server.</span></div>
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<span style="color: #0b5394;">CentOS, RHEL & Fedora Users –</span></h3>
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<span style="font-family: Georgia, Times New Roman, serif;">CentOS, Red Hat, Fedora and other rpm based distributions rename<span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-weight: 700; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline;">/etc/httpd/conf.modules.d/XX-cgi.conf</span> configuration file like below.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">$ mv /etc/httpd/conf.modules.d/XX-cgi.conf /etc/httpd/conf.modules.d/XX-cgi.conf.disable<span style="font-size: 0.9em;">
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<span style="color: #0b5394;">Ubuntu, Debian & LinuxMint Users –</span></h3>
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<span style="font-family: Georgia, Times New Roman, serif;">Ubuntu, Debian, LinuxMint and other Debian derivatives use following command to disable CGI module.</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: white; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;">$ a2dismod cgi
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<span style="font-family: Georgia, Times New Roman, serif;">After disabling CGI modules you need to restart Apache service on your system for changes take effect.</span></div>
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Reference:-<br /><span style="color: red;"><a href="http://httpd.apache.org/docs/2.4/howto/cgi.html">http://httpd.apache.org/docs/2.4/howto/cgi.html</a></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); color: #333333; font-size: 12px; line-height: 19.2px; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="line-height: 15.6px;"><pre style="background-attachment: scroll; background-clip: initial; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); font-size: 0.9em; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><a href="http://www.hackthesec.co.in/" target="_blank">http://www.hackthesec.co.in</a>
<a href="http://www.twitter.com/hackthesecurity" target="_blank">http://www.twitter.com/hackthesecurity</a>
<span style="color: #999999;"><a href="https://www.facebook.com/htsecu">https://www.facebook.com/htsecu</a></span></pre>
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How To Enable or Disable CGI Scripts in Apache 2.4

How To Enable or Disable CGI Scripts in Apache 2.4 Apache Module mod_cgi/mod_cgid is responsible for handling of CGI Scripts. for w...

Install and Configure Caching-Only DNS Server in RHEL/CentOS 7

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<span style="color: #990000; font-size: x-large;">Install and Configure Caching-Only DNS Server in RHEL/CentOS 7</span><br />
<span style="background-color: white; font-family: Verdana, sans-serif; line-height: 28.8px;">DNS servers comes in several types such as master, slave, forwarding and cache, to name a few examples, with cache-only DNS being the one that is easier to setup. Since DNS uses the UDP protocol, it improves the query time because it does not require an acknowledgement.</span><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGmlA863bI-9bY9VrlFYVC-uB7nhDSRVe3oqRhIjT0ACX5k3aih65GwI1OegSFwsV_S82UZ8u84NNlNHPkgkfW_BTIbJ9xxAA2PCPELHRQNoIJwPBiCM7Jjj0SlsOzskdVbHOUOXHReufH/s1600/Setup-Cache-Only-DNS-in-CentOS-RHEL-7_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="306" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGmlA863bI-9bY9VrlFYVC-uB7nhDSRVe3oqRhIjT0ACX5k3aih65GwI1OegSFwsV_S82UZ8u84NNlNHPkgkfW_BTIbJ9xxAA2PCPELHRQNoIJwPBiCM7Jjj0SlsOzskdVbHOUOXHReufH/s640/Setup-Cache-Only-DNS-in-CentOS-RHEL-7_www.hackthesec.co.in.png" width="640" /></a></div>
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<ul style="text-align: left;">
<li><span style="background-color: white; font-family: 'roboto condensed', arial, sans-serif; font-size: 18px; line-height: 28.8px;"><a href="http://www.hackthesec.co.in/2016/01/how-to-setup-dns-bind-server-on.html" target="_blank"><span style="color: red;">How to Setup DNS (Bind) Server on CentOS/RHEL 7/6/5</span></a></span></li>
</ul>
<span style="background-color: white; font-family: Verdana, sans-serif; line-height: 28.8px;">The cache-only DNS server is also known as resolver, which will query DNS records and fetch all the DNS details from other servers, and keep each query request in its cache for later use so that when we perform the same request in the future, it will serve from its cache, thus reducing the response time even more.</span><br />
<u><span style="font-family: Arial, Helvetica, sans-serif;"><span style="background-color: white; line-height: 28.8px;"><br /></span>
</span></u><br />
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<span style="color: #0b5394; font-family: Arial, Helvetica, sans-serif; font-size: small;"><span style="font-family: Arial, Helvetica, sans-serif; font-size: large; line-height: 18px;"><u>My Testing Environment</u></span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;">DNS server  : dns.hackthesec.co.in (Red Hat Enterprise Linux 7.1)
Server IP Address : 192.168.1.17
Client   : node1.</span></span><span style="color: white; font-size: 12px; line-height: 15.6000003814697px;">hackthesec.co.in</span><span style="color: white; font-size: 12px; line-height: 15.6000003814697px;"> (CentOS 7.1)</span>
<span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;">Client IP Address : 192.168.1.35</span></span></pre>
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<span style="color: #0b5394; font-family: "arial" , "helvetica" , sans-serif;"><span style="line-height: 18px;">Step 1: Installing Cache-Only DNS Server in RHEL/CentOS 7</span></span></div>
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<span style="line-height: 28.7999992370605px;"><span style="font-family: "arial" , "helvetica" , sans-serif;">1.The Cache-Only DNS server, can be installed via the bind package. If you don’t remember the package name, you can do a quick search for the package name using the command below.</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;"># yum search bind</span></span></pre>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">2.</span><span style="line-height: 28.7999992370605px;"> In the above result, you will see several packages. From those, we need to choose and install only</span><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">bind</span><span style="line-height: 28.7999992370605px;"> and </span><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">bind-utils</span><span style="line-height: 28.7999992370605px;"> packages using following yum command.</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;"># yum install bind bind-utils -y</span></span></pre>
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<span style="color: #0b5394; font-family: "arial" , "helvetica" , sans-serif; font-size: medium;"><span style="line-height: 18px;">Step 2: Configure Cache-Only DNS in RHEL/CentOS 7</span></span></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">3.</span><span style="line-height: 28.7999992370605px;"> Once DNS packages are installed we can go ahead and configure DNS. Open and edit</span></span></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><code style="background: none 0px 0px repeat scroll rgb(246, 246, 248); border-radius: 3px; border: 1px solid rgb(158, 158, 159); font-stretch: inherit; font-weight: 600; line-height: 1.6; margin: 0px; max-width: 100%; overflow: auto; padding: 2px; vertical-align: baseline; white-space: pre;">/etc/named.conf</code><span style="line-height: 28.7999992370605px;"> using your preferred text editor. Make the changes suggested below (or you can use your settings as per your requirements).</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;">listen-on port 53 { 127.0.0.1; any; };
allow-query     { localhost; any; };
allow-query-cache       { localhost; any; };</span></span></pre>
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<span style="font-family: "arial" , "helvetica" , sans-serif;">These directives instruct the DNS server to listen on <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">UDP</span> port <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">53</span>, and to allow queries and caches responses from <span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">localhost</span> and any other machine that reaches the server.</span></div>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">4.</span> It is important to note that the ownership of this file must be set to <code style="background-attachment: scroll; background-clip: initial; background-color: #f6f6f8; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 3px; border: 1px solid rgb(158, 158, 159); font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: 1.6; margin: 0px; max-width: 100%; overflow: auto; padding: 2px; vertical-align: baseline; white-space: pre;">root:named</code> and also if<span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">SELinux</span> is enabled, after editing the configuration file we need to make sure that its context is set to<code style="background-attachment: scroll; background-clip: initial; background-color: #f6f6f8; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 3px; border: 1px solid rgb(158, 158, 159); font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: 1.6; margin: 0px; max-width: 100%; overflow: auto; padding: 2px; vertical-align: baseline; white-space: pre;">named_conf_t</code> as shown in Fig. 4 (same thing for the auxiliary file <code style="background-attachment: scroll; background-clip: initial; background-color: #f6f6f8; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 3px; border: 1px solid rgb(158, 158, 159); font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: 1.6; margin: 0px; max-width: 100%; overflow: auto; padding: 2px; vertical-align: baseline; white-space: pre;">/etc/named.rfc1912.zones</code>):</span></div>
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<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;"># ls -lZ /etc/named.conf
# ls -lZ /etc/named.rfc1912.zones</span></span></pre>
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<span style="line-height: 28.7999992370605px;"><span style="font-family: "arial" , "helvetica" , sans-serif;">Otherwise, configure the SELinux context before proceeding:</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;"># semanage fcontext -a -t named_conf_t /etc/named.conf
# semanage fcontext -a -t named_conf_t /etc/named.rfc1912.zones</span></span></pre>
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<span style="color: white;"><span style="line-height: 15.6000003814697px;"><br /></span></span></div>
<div style="background-color: white; line-height: 1.5em; margin-bottom: 10px;">
<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">5.</span><span style="line-height: 28.7999992370605px;"> Additionally, we need to test the DNS configuration now for some syntax error before starting the bind service:</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;"># named-checkconf /etc/named.conf</span></span></pre>
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<span style="color: white;"><span style="line-height: 15.6000003814697px;"><br /></span></span></div>
<div style="background-color: white; line-height: 1.5em; margin-bottom: 10px;">
<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">6.</span><span style="line-height: 28.7999992370605px;"> After the syntax verification results seems perfect, restart the </span><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">named</span><span style="line-height: 28.7999992370605px;"> service to take new changes into effect and also make the service to auto start across system boots, and then check its status:</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;"># systemctl restart named
# systemctl enable named
# systemctl status named</span></span></pre>
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<div style="background-color: white; line-height: 1.5em; margin-bottom: 10px;">
<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">7.</span><span style="line-height: 28.7999992370605px;"> Next, open the port 53 on the firewall.</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;"># firewall-cmd --add-port=53/udp
# firewall-cmd --add-port=53/udp --permanent</span></span></pre>
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<span style="color: #0b5394; font-family: "arial" , "helvetica" , sans-serif; font-size: medium;"><span style="line-height: 18px;">Step 3: Chroot Cache-Only DNS Server in RHEL and CentOS 7</span></span></div>
<div style="background-color: white; margin-bottom: 10px;">
<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">8.</span><span style="line-height: 28.7999992370605px;"> If you wish to deploy the Cache-only DNS server within </span><span style="border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">chroot</span><span style="line-height: 28.7999992370605px;"> environment, you need to have the package </span><span style="border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">chroot</span><span style="line-height: 28.7999992370605px;"> installed on the system and no further configuration is needed as it by default hard-link to chroot.</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;"># yum install bind-chroot -y</span></span></pre>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="line-height: 28.7999992370605px;">Once </span><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">chroot</span><span style="line-height: 28.7999992370605px;"> package has been installed, you can restart named to take the new changes into effect:</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;"># systemctl restart named</span></span></pre>
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<div style="background-color: white; line-height: 1.5em; margin-bottom: 10px;">
<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">9.</span><span style="line-height: 28.7999992370605px;"> Next, create a symbolic link (also named </span><code style="background-attachment: scroll; background-clip: initial; background-color: #f6f6f8; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 3px; border: 1px solid rgb(158, 158, 159); font-stretch: inherit; font-weight: 600; line-height: 1.6; margin: 0px; max-width: 100%; overflow: auto; padding: 2px; vertical-align: baseline; white-space: pre;">/etc/named.conf</code><span style="line-height: 28.7999992370605px;">) inside </span><code style="background-attachment: scroll; background-clip: initial; background-color: #f6f6f8; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border-radius: 3px; border: 1px solid rgb(158, 158, 159); font-stretch: inherit; font-weight: 600; line-height: 1.6; margin: 0px; max-width: 100%; overflow: auto; padding: 2px; vertical-align: baseline; white-space: pre;">/var/named/chroot/etc/</code><span style="line-height: 28.7999992370605px;">:</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;"># ln -s /etc/named.conf /var/named/chroot/etc/named.conf</span></span></pre>
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<span style="color: #0b5394; font-family: "arial" , "helvetica" , sans-serif; font-size: medium;"><span style="line-height: 18px;">Step 4: Configure DNS on Client Machine</span></span></div>
<div style="background-color: white; margin-bottom: 10px;">
<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">10.</span><span style="line-height: 28.7999992370605px;"> Add the DNS Cache servers </span><span style="border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">IP 192.168.0.18</span><span style="line-height: 28.7999992370605px;"> as resolver to the client machine. Edit</span><code style="background: none 0px 0px repeat scroll rgb(246, 246, 248); border-radius: 3px; border: 1px solid rgb(158, 158, 159); font-stretch: inherit; font-weight: 600; line-height: 1.6; margin: 0px; max-width: 100%; overflow: auto; padding: 2px; vertical-align: baseline; white-space: pre;">/etc/sysconfig/network-scripts/ifcfg-eth0</code><span style="line-height: 28.7999992370605px;"> as shown in the following figure:</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;">DNS=192.168.1.17</span></span></pre>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;">HWADDR=00:1A:4D:9A:F7:CE
TYPE=Ethernet
BOOTPROTO=static
IPADDR=192.168.1.35
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
NM_CONTROLLED=no
DEFROUTE=yes
PEERDNS=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEEROUTER=yes
IPV6_FAILURE_FATAL=no
NAME=eth0
DNS=192.168.1.17
ONBOOT=yes</span></span></pre>
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<div style="background-color: white; color: #333333; font-family: Verdana, Geneva, sans-serif; line-height: 1.5em; margin-bottom: 10px;">
<span style="color: #272727; font-family: "roboto condensed" , "arial" , sans-serif; line-height: 28.7999992370605px;">And </span><span style="border: 0px; font-family: "roboto condensed" , "arial" , sans-serif; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">/etc/resolv.conf</span><span style="color: #272727; font-family: "roboto condensed" , "arial" , sans-serif; line-height: 28.7999992370605px;"> as follows:</span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;">nameserver 192.168.1.17</span></span></pre>
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<div style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">11.</span> Finally it’s time to check our cache server. To do this, you can use dig utility or nslookup command.</span></div>
<div style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="font-family: "arial" , "helvetica" , sans-serif; line-height: 28.7999992370605px;">Choose any website and query it twice (we will use</span><span style="font-family: "arial" , "helvetica" , sans-serif; line-height: 28.7999992370605px;"> </span><span style="border: 0px; font-family: "arial" , "helvetica" , sans-serif; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">facebook.com</span><span style="font-family: "arial" , "helvetica" , sans-serif; line-height: 28.7999992370605px;"> </span><span style="font-family: "arial" , "helvetica" , sans-serif; line-height: 28.7999992370605px;">as an example). Note that with dig the second time the query is completed much faster because it is being served from the cache.</span></div>
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<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;">root@hackthesec:/home/hackthesec# dig facebook.com

; <<>> DiG 9.9.5-9-Ubuntu <<>> facebook.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50459
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;facebook.com.   IN A

;; ANSWER SECTION:
facebook.com.  285 IN A 66.220.158.68

;; Query time: 65 msec
;; SERVER:192.168.1.17#53(</span></span><span style="color: white; font-size: 12px; line-height: 15.6000003814697px;">192.168.1.17</span><span style="color: white; font-size: 12px; line-height: 15.6000003814697px;">)</span>
<span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;">;; WHEN: Mon Jan 25 16:59:32 IST 2016
;; MSG SIZE  rcvd: 57</span></span>
</pre>
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<span style="font-family: "arial" , "helvetica" , sans-serif;"><span style="line-height: 28.7999992370605px;">You can also use </span><span style="border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 0px; font-stretch: inherit; line-height: 28.7999992370605px; margin: 0px; padding: 0px; vertical-align: baseline;">nslookup</span><span style="line-height: 28.7999992370605px;"> to verify that the DNS server is working as expected.</span></span></div>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;">[root@node1 ~]# nslookup facebook.com
Server:         192.168.1.17
Address:        192.168.1.17#53

Non-authoritative answer:
Name:  facebook.com
Address: 66.220.158.68</span></span></pre>
<pre style="background: none 0px 0px repeat scroll rgb(60, 60, 60); border-radius: 4px; border: 1px solid rgb(229, 229, 229); margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: white;"><span style="font-size: 12px; line-height: 15.6000003814697px;"><pre style="background-attachment: scroll; background-clip: initial; background-image: none; background-origin: initial; background-position: 0px 0px; background-repeat: repeat; background-size: initial; border-radius: 4px; border: 1px solid rgb(229, 229, 229); font-size: 0.9em; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><a href="http://www.hackthesec.co.in/" target="_blank">http://www.hackthesec.co.in</a>
<a href="http://www.twitter.com/hackthesecurity" target="_blank">http://www.twitter.com/hackthesecurity</a>
<span style="color: #999999;"><a href="https://www.facebook.com/htsecu">https://www.facebook.com/htsecu</a></span></pre>
</span></span></pre>
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