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How to Install Usermin On Centos

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<span style="color: #990000; font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif; font-size: x-large;"><span style="font-weight: normal; line-height: 28px;"><i><u>Install Usermin On Centos</u></i></span></span></h2>
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<span style="color: #990000; font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif; font-size: x-large;"><span style="font-weight: normal; line-height: 28px;"><i><u><br /></u></i></span></span></div>
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<span style="color: #0b5394; font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif; font-size: x-large;"><span style="font-weight: normal; line-height: 28px;">What is Usermin?</span></span></h2>
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<span style="color: #0b5394; font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif;"><span style="font-weight: normal; line-height: 28px;"><br /></span></span></div>
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<span style="background-color: white;"><span style="color: #222222; font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif; font-size: large;"><span style="line-height: 30px;">Usermin is a web-based interface for webmail, password changing, mail filters, fetchmail and much more. It is designed for use by regular non-root users on a Unix system, and limits them to tasks that they would be able to perform if logged in via SSH or at the console. See the <a href="http://www.webmin.com/ustandard.html">standard modules</a> page for a list of all the functions built into Usermin.</span></span></span></div>
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<ul style="text-align: left;">
<li><a href="http://www.hackthesec.co.in/2016/01/how-to-install-webmin-on-centos-6.html" style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; line-height: 30px;"><span style="color: red; font-size: large;">How to install webmin on centos 6</span></a></li>
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<span style="color: #0b5394; font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif; font-size: x-large;"><span style="font-weight: normal; line-height: 28px;">Who can use Usermin?</span></span></h2>
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<span style="color: #222222; font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif; font-size: large;"><span style="line-height: 30px;">Most users of Usermin are sysadmins looking for a simple webmail interface to offer their customers. Unlike most other webmail solutions, it can be used to change passwords, read email with no additional servers installed (like IMAP or POP3), and setup users' Procmail configurations for forwarding, spam filtering and autoreponders.</span></span></div>
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<span style="color: #222222; font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif; font-size: large;"><span style="line-height: 30px;">Usermin also provides web interfaces for viewing and managing data in MySQL and PostgreSQL databases, editing Apache .htaccess configuration files, and running commands on the server. The administrator has full control over which of these modules are available to users.</span></span></div>
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<span style="background-color: white;"><span style="color: #222222; font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif;"><span style="line-height: 30px;"> </span></span></span></div>
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<span style="font-size: large;"><strong style="color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; line-height: 30px;">Step 1 :</strong><span style="color: #222222;"><span style="font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif;"><span style="line-height: 30px;">Install required packages first.</span></span></span></span></div>
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<code style="background-color: #0e0e0e; border-radius: 5px; display: block; padding: 4px;"><code style="border-radius: 5px; display: block; padding: 4px;"><code style="border-radius: 5px; display: block; padding: 4px;"><span style="color: white; font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;"># install from <a href="http://www.hackthesec.co.in/2016/01/centos-rhel-scientific-linux-6-enable.html">EPEL</a></span></span></code><code style="border-radius: 5px; display: block; padding: 4px;"><span style="font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;"><span style="color: white;">[root@hackthesec ~]# yum --enablerepo=</span><span style="color: lime;">epel -y</span><span style="color: white;"> install perl-Net-SSLeay perl-Authen-PAM</span></span></span></code></code></code><div style="color: #333333; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
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<span style="font-size: large;"><strong style="color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; line-height: 30px;">Step 2 :</strong><span style="color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; line-height: 30px;"> </span><span style="color: #222222;"><span style="font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif;"><span style="line-height: 30px;">Install Usermin. <a href="http://download.webmin.com/download/yum/">Make sure the latest Usermin before</a>.</span></span></span></span><br />
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<code style="background-color: #0e0e0e; border-radius: 5px; display: block; padding: 4px;"><code style="border-radius: 5px; display: block; padding: 4px;"><code style="border-radius: 5px; display: block; padding: 4px;"><span style="font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;"><span style="color: white;">[root@hackthesec ~]# yum -y </span><span style="color: lime;">install</span><span style="color: white;"> http://download.webmin.com/download/yum/usermin-1.651-1.noarch.rpm</span></span></span></code><code style="border-radius: 5px; display: block; padding: 4px;"><span style="font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;"><span style="color: white;">[root@hackthesec ~]# vi /etc/</span><span style="color: lime;">usermin</span><span style="color: white;">/miniserv.conf</span></span></span></code><code style="border-radius: 5px; display: block; padding: 4px;"><span style="color: white; font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;"># add follows to the end (IP addess you allow to access)</span></span></code><code style="border-radius: 5px; display: block; padding: 4px;"><span style="color: white; font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;">allow=127.0.0.1 10.0.0.0/24</span></span></code><code style="border-radius: 5px; display: block; padding: 4px;"><span style="color: white; font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;"># prohibit root login</span></span></code><code style="border-radius: 5px; display: block; padding: 4px;"><span style="font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;"><span style="color: white;">denyusers=</span><span style="color: lime;">root</span></span></span></code><code style="border-radius: 5px; display: block; padding: 4px;"><span style="font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;"><span style="color: white;">[root@hackthesec ~]# /etc/rc.d/init.d/</span><span style="color: lime;">usermin</span><span style="color: white;"> restart </span></span></span></code><code style="border-radius: 5px; display: block; padding: 4px;"><span style="font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;"><span style="color: white;">Stopping Usermin server in /usr/libexec/</span><span style="color: lime;">usermin</span></span></span></code><code style="border-radius: 5px; display: block; padding: 4px;"><span style="color: white; font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;">Starting Usermin server in /usr/libexec/usermin</span></span></code><code style="border-radius: 5px; display: block; padding: 4px;"><span style="font-family: Verdana, MS Sans Serif, sans-serif, serif;"><span style="font-size: 14px; line-height: 25px;"><span style="color: white;">Pre-loaded </span><span style="color: lime;">WebminCore</span></span></span></code></code></code><div style="color: #333333; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
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<span style="font-size: large;"><strong style="color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; line-height: 30px;">Step 3 :</strong><span style="color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; line-height: 30px;"> </span><span class="Apple-tab-span" style="color: #222222; line-height: 30px; white-space: pre;"><span style="font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif;"> </span></span><span style="font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif;"><span style="line-height: 30px;"><span style="color: #222222;">Start Web browser on localhost or on another client on the network and access to "</span><span style="color: red;">https://(server's hostname or IP address):20000/</span><span style="color: #222222;">". Then, Usermin site is displayed, login with a common account.</span></span></span></span><br />
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<span style="font-size: large;"><strong style="color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; line-height: 30px;">Step 4:</strong><span style="font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif;"><span style="line-height: 30px;"><span style="color: #222222;"> This is the main page of </span><b>Usermin</b><span style="color: #222222;">. It's possible to operate various things</span></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-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-size: 12px; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><a href="http://www.hackthesec.co.in/" style="color: #999999; text-decoration: none;" target="_blank">Hack The Security</a>
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How to Install Usermin On Centos

Install Usermin On Centos What is Usermin? Usermin is a web-based interface for webmail, password changing, mail filters, fetchmai...

Ramui Web Hosting Directory Script 4.0 - Remote File Inclusion

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Ramui Web Hosting Directory Script 4.0 - Remote File Inclusion</h1>
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<strong style="background-color: white; font-family: Verdana, Geneva, sans-serif; line-height: 19.2px;"><a class="titlex" href="http://www.hackthesec.co.in/2016/01/ramui-forum-script-90-sql-injection.html" style="display: block; font-family: 'Open Sans', serif, sans-serif; font-stretch: normal; line-height: 1.4em; margin: 5px 0px 0px; max-height: 36px; overflow: hidden; text-decoration: none;"><br /></a></strong></div>
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<table class="exploit_list" style="background-color: rgb(239, 239, 239) !important; border-radius: 3px !important; border-spacing: 1px; border: 1px solid rgb(221, 221, 221) !important; box-sizing: border-box; color: #666666; font-family: 'Open Sans', sans-serif; font-size: 14px; line-height: 24px; margin-bottom: 10px; margin-top: 10px; padding: 1px !important; width: 552px;"><tbody style="box-sizing: border-box;">
<tr style="background-color: rgb(248, 248, 248) !important; box-sizing: border-box;"><td style="box-sizing: border-box; padding: 5px 10px;"><strong style="box-sizing: border-box;">EDB-ID:</strong> 39355</td><td style="box-sizing: border-box; padding: 5px 10px;"><strong style="box-sizing: border-box;">CVE:</strong> N/A</td><td style="box-sizing: border-box; padding: 5px 10px;"><strong style="box-sizing: border-box;">OSVDB-ID:</strong> N/A</td></tr>
<tr style="background-color: rgb(248, 248, 248) !important; box-sizing: border-box;"><td style="box-sizing: border-box; padding: 5px 10px;"><strong style="box-sizing: border-box;">EDB Verified:</strong> <span class="fa fa-times" style="-webkit-font-smoothing: antialiased; box-sizing: border-box; display: inline-block; font-family: FontAwesome; font-size: inherit; font-stretch: normal; line-height: 1; text-rendering: auto;"></span></td><td style="box-sizing: border-box; padding: 5px 10px;"><strong style="box-sizing: border-box;">Author:</strong> <a href="https://www.exploit-db.com/author/?a=768" style="background-color: transparent; box-sizing: border-box; color: #337ab7; outline: 0px; text-decoration: none; transition-duration: 0.3s; transition-property: background-color, box-shadow, border, color, opacity;">bd0rk</a></td><td style="box-sizing: border-box; padding: 5px 10px;"><strong style="box-sizing: border-box;">Published:</strong> 2016-01-28</td></tr>
<tr style="background-color: rgb(248, 248, 248) !important; box-sizing: border-box;"><td style="box-sizing: border-box; padding: 5px 10px;"><strong style="box-sizing: border-box;">Download Exploit:</strong> <a href="https://www.exploit-db.com/download/39355" style="background-color: transparent; box-sizing: border-box; color: #337ab7; outline: 0px; text-decoration: none; transition-duration: 0.3s; transition-property: background-color, box-shadow, border, color, opacity;"><span class="fa fa-file-code-o" style="-webkit-font-smoothing: antialiased; box-sizing: border-box; display: inline-block; font-family: FontAwesome; font-size: inherit; font-stretch: normal; line-height: 1; text-rendering: auto;"></span> Source</a> <span class="fa fa-file-o" style="-webkit-font-smoothing: antialiased; box-sizing: border-box; display: inline-block; font-family: FontAwesome; font-size: inherit; font-stretch: normal; line-height: 1; text-rendering: auto;"></span> </td><td colspan="2" style="box-sizing: border-box; padding: 5px 10px;"><strong style="box-sizing: border-box;">Download Vulnerable App:</strong> <a href="https://www.exploit-db.com/apps/6abea7ec2c8e0031acdfdbbd622ea45e-ramui-web-hosting-directory-script-v4.tar.gz" style="background-color: transparent; box-sizing: border-box; color: #337ab7; outline: 0px; text-decoration: none; transition-duration: 0.3s; transition-property: background-color, box-shadow, border, color, opacity;"><span class="fa fa-download" style="-webkit-font-smoothing: antialiased; box-sizing: border-box; display: inline-block; font-family: FontAwesome; font-size: inherit; font-stretch: normal; line-height: 1; text-rendering: auto;"></span></a></td></tr>
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<br /><strong style="background-color: white; font-family: Verdana, Geneva, sans-serif; line-height: 19.2px;"><a class="titlex" href="http://www.hackthesec.co.in/2016/01/ramui-forum-script-90-sql-injection.html" style="display: block; font-family: 'Open Sans', serif, sans-serif; font-stretch: normal; line-height: 1.4em; margin: 5px 0px 0px; max-height: 36px; overflow: hidden; text-decoration: none;"></a><ul style="text-align: left;"><a class="titlex" href="http://www.hackthesec.co.in/2016/01/ramui-forum-script-90-sql-injection.html" style="display: block; font-family: 'Open Sans', serif, sans-serif; font-stretch: normal; line-height: 1.4em; margin: 5px 0px 0px; max-height: 36px; overflow: hidden; text-decoration: none;"></a>
<li><a class="titlex" href="http://www.hackthesec.co.in/2016/01/ramui-forum-script-90-sql-injection.html" style="display: block; font-family: 'Open Sans', serif, sans-serif; font-stretch: normal; line-height: 1.4em; margin: 5px 0px 0px; max-height: 36px; overflow: hidden; text-decoration: none;"><strong style="font-family: Verdana, Geneva, sans-serif; line-height: 19.2px;"></strong></a><strong style="font-family: Verdana, Geneva, sans-serif; line-height: 19.2px;"><a class="titlex" href="http://www.hackthesec.co.in/2016/01/ramui-forum-script-90-sql-injection.html" style="display: inline !important; font-family: 'Open Sans', serif, sans-serif; font-stretch: normal; line-height: 1.4em; margin: 5px 0px 0px; max-height: 36px; overflow: hidden; text-decoration: none;"><span style="color: red; font-size: large;">Ramui Forum Script 9.0 - SQL Injection Exploit</span></a></strong></li>
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</strong><br /><br /><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); color: white; font-family: 'roboto slab'; font-size: 12px; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><span style="color: #999999;">Hack The Security</span>
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Ramui Web Hosting Directory Script 4.0 - Remote File Inclusion

Ramui Web Hosting Directory Script 4.0 - Remote File Inclusion EDB-ID: 39355 CVE: N/A OSVDB-ID: N/A EDB Verified: Author:...

Ramui Forum Script 9.0 - SQL Injection Exploit

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Ramui Forum Script 9.0 - SQL Injection Exploit</h1>
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<b style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 16px; line-height: 19.84px;">SQL injection</b><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 16px; line-height: 19.84px;"> is a code </span><b style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 16px; line-height: 19.84px;">injection</b><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 16px; line-height: 19.84px;"> technique, used to attack data-driven applications, in </span></div>
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<span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 16px; line-height: 19.84px;">which malicious </span><b style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 16px; line-height: 19.84px;">SQL</b><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 16px; line-height: 19.84px;"> statements are inserted into an entry field for execution (e.g. to dump </span></div>
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<span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 16px; line-height: 19.84px;"><br /></span></div>
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<span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 16px; line-height: 19.84px;">the database contents to the attacker).</span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxcfwiuma2cF9VhPIhn3KM4IT7umiY4dEJS4QEXkhVjv9IQDFfWMQkTTkRihi8npUgoUgbasUYO0viPWIHIyMzMphQUCPtRDEdOphmxadJ4z7RTl_SBc3l-Az2ae2GcOPZINzjzb_4QseV/s1600/Ramui+Forum+Script_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="318" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxcfwiuma2cF9VhPIhn3KM4IT7umiY4dEJS4QEXkhVjv9IQDFfWMQkTTkRihi8npUgoUgbasUYO0viPWIHIyMzMphQUCPtRDEdOphmxadJ4z7RTl_SBc3l-Az2ae2GcOPZINzjzb_4QseV/s640/Ramui+Forum+Script_www.hackthesec.co.in.png" width="640" /></a></div>
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<table class="exploit_list" style="background-color: rgb(239, 239, 239) !important; border-radius: 3px !important; border-spacing: 1px; border: 1px solid rgb(221, 221, 221) !important; box-sizing: border-box; color: #666666; font-family: 'Open Sans', sans-serif; font-size: 14px; line-height: 24px; margin-bottom: 10px; margin-top: 10px; padding: 1px !important; width: 552px;"><tbody style="box-sizing: border-box;">
<tr style="background-color: rgb(248, 248, 248) !important; box-sizing: border-box;"><td style="box-sizing: border-box; padding: 5px 10px;"><strong style="box-sizing: border-box;">EDB-ID:</strong> 39354</td><td style="box-sizing: border-box; padding: 5px 10px;"></td><td style="box-sizing: border-box; padding: 5px 10px;"><br /></td></tr>
<tr style="background-color: rgb(248, 248, 248) !important; box-sizing: border-box;"><td style="box-sizing: border-box; padding: 5px 10px;"><br /><table class="exploit_list" style="background-color: rgb(239, 239, 239) !important; border-radius: 3px !important; border-spacing: 1px; border: 1px solid rgb(221, 221, 221) !important; box-sizing: border-box; color: #666666; font-size: 14px; line-height: 24px; margin-bottom: 10px; margin-top: 10px; padding: 1px !important; width: 552px;"><tbody style="box-sizing: border-box;">
<tr style="background-color: rgb(248, 248, 248) !important; box-sizing: border-box;"><td style="box-sizing: border-box; padding: 5px 10px;"><strong style="box-sizing: border-box;">Author:</strong> bd0rk</td></tr>
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</td><td style="box-sizing: border-box; padding: 5px 10px;"><br /></td><td style="box-sizing: border-box; padding: 5px 10px;"><br /></td></tr>
<tr style="background-color: rgb(248, 248, 248) !important; box-sizing: border-box;"><td style="box-sizing: border-box; padding: 5px 10px;"><strong style="box-sizing: border-box;">Download Exploit:</strong> <a href="https://www.exploit-db.com/download/39354" style="background-color: transparent; box-sizing: border-box; color: #337ab7; outline: 0px; text-decoration: none; transition-duration: 0.3s; transition-property: background-color, box-shadow, border, color, opacity;"><span class="fa fa-file-code-o" style="-webkit-font-smoothing: antialiased; box-sizing: border-box; display: inline-block; font-family: FontAwesome; font-size: inherit; font-stretch: normal; line-height: 1; text-rendering: auto;"></span> Source</a> <a href="https://www.blogger.com/null" style="background-color: transparent; box-sizing: border-box; color: #337ab7; outline: 0px; transition-duration: 0.3s; transition-property: background-color, box-shadow, border, color, opacity;"><span class="fa fa-file-o" style="-webkit-font-smoothing: antialiased; box-sizing: border-box; display: inline-block; font-family: FontAwesome; font-size: inherit; font-stretch: normal; line-height: 1; text-rendering: auto;"></span> </a></td><td colspan="2" style="box-sizing: border-box; padding: 5px 10px;"><br /></td></tr>
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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); color: white; font-family: 'roboto slab'; font-size: 12px; line-height: 1.3em; margin-bottom: 20px; outline: 0px; overflow: auto; padding: 20px; vertical-align: baseline;"><a href="http://www.hackthesec.co.in/" style="color: #999999; text-decoration: none;" target="_blank">Hack The Security</a>
<a href="https://www.twitter.com/hackthesecurity" style="color: #999999; text-decoration: none;" target="_blank">Hack The Security Twitter</a>
<a href="https://www.facebook.com/htsecu" style="color: #999999; text-decoration: none;" target="_blank">Hack The Security Facebook</a></pre>
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Ramui Forum Script 9.0 - SQL Injection Exploit

Ramui Forum Script 9.0 - SQL Injection Exploit SQL injection is a code injection technique, used to attack data-driven applicat...

How to install VNC server on Centos 7

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<span style="background-color: white; color: #222222; font-family: "trebuchet" , "trebuchet ms" , "arial" , "verdana" , sans-serif; font-size: 16px; line-height: 30px;"><b>VNC </b>server is used to connect and control desktop environment of the server from remote clients. <b>VNC viewer</b> is used on remote computer to connect the server .</span><br />
<span style="background-color: white; color: #222222; font-family: "trebuchet" , "trebuchet ms" , "arial" , "verdana" , sans-serif; font-size: 16px; line-height: 30px;">In the article we can learn about how to install vnc server on <a href="http://www.hackthesec.co.in/search/label/Centos">centos 7</a> . we can use the default packages provided in the <a href="http://www.hackthesec.co.in/search/label/Centos">centos </a>yum repository.</span><br />
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<span style="background-color: white; font-family: "trebuchet" , "trebuchet ms" , "arial" , "verdana" , sans-serif; line-height: 30px;"><strong style="font-family: Verdana, Geneva, sans-serif; line-height: 19.2px;"><a class="titlex" href="http://www.hackthesec.co.in/2016/01/how-to-setup-x11vnc-server-on-ubuntu.html" style="display: block; font-family: 'Open Sans', serif, sans-serif; font-stretch: normal; line-height: 1.4em; margin: 5px 0px 0px; max-height: 36px; overflow: hidden; text-decoration: none;"></a></strong></span><br />
<strong style="line-height: 19.2px;"><strong style="line-height: 19.2px;"><a class="titlex" href="http://www.hackthesec.co.in/2016/01/how-to-setup-x11vnc-server-on-ubuntu.html" style="display: inline; font-stretch: normal; line-height: 1.4em; margin: 5px 0px 0px; max-height: 36px; overflow: hidden; text-decoration: none;"><span style="color: red; font-family: Helvetica Neue, Arial, Helvetica, sans-serif; font-size: x-large;">How to Setup X11VNC Server on Ubuntu & LinuxMint</span></a></strong></strong><br />
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<span style="background-color: white; color: #0b5394; font-family: "trebuchet" , "trebuchet ms" , "arial" , "verdana" , sans-serif; font-size: 24px; line-height: 28px;">Install vnc server on centos 7</span><br />
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<span style="color: #222222;">Let’s start. If you don’t have desktop environment ( </span><b><span style="color: magenta;">X windows</span></b><span style="color: #222222;"> ), issue the below commands one by one to install. It will take few minutes to install packages.</span></div>
<div style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<br />
<code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# yum check-update<br />[root@</span><span style="color: white;">hackthesec </span><span style="color: white;">~]# yum groupinstall "X Window System"<br />[root@</span><span style="color: white;">hackthesec </span><span style="color: white;">~]# yum </span><span style="color: lime;">install gnome-classic-session gnome-terminal</span><span style="color: white;"> nautilus-open-terminal control-center liberation-mono-fonts</span><br /><span style="color: white;">[root@</span><span style="color: white;">hackthesec </span><span style="color: white;">~]# </span><span style="color: lime;">unlink /etc/systemd/system/default.target</span><br /><span style="color: white;">[root@</span><span style="color: white;">hackthesec </span><span style="color: white;">~]# ln -sf /lib/systemd/system/graphical.target /etc/systemd/system/default.target</span><br /><span style="color: white;">[root@</span><span style="color: white;">hackthesec </span><span style="color: white;">~]# </span><span style="color: lime;">reboot</span></code><br />
<span style="color: #222222;">After reboot, you will get Centos 7 desktop .</span></div>
<div style="background-color: white; color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
Now start installing VNC packages.<br />
<strong>Step 1 :</strong> Issue the below command to install VNC package.</div>
<div style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
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<code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@</span><span style="color: white;">hackthesec </span><span style="color: white;"> ~]# yum install </span><span style="color: lime;">tigervnc-server</span><span style="color: white;"> -y</span></code><br />
<strong style="color: #222222;">Step 2 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> Create a file </span><span style="color: red;"><strong>vncserver@:1.service</strong> in <strong>/etc/systemd/system/</strong></span><span style="color: #222222;"> directory by copying example config file </span><strong><span style="color: red;">/lib/systemd/system/vncserver@.service</span></strong></div>
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<b style="color: #222222;"><br /></b><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@</span><span style="color: white;">hackthesec </span><span style="color: white;">~]# cp /lib/systemd/system/</span><span style="color: lime;">vncserver@.service</span><span style="color: white;"> /etc/systemd/system/vncserver@:1.service</span></code><br />
<strong style="color: #222222;">Step 3 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> Now open </span><strong><span style="color: red;">/etc/systemd/system/vncserver@:1.service</span></strong><span style="color: #222222;"> file and replace</span><user style="color: #222222;">with your username .<br />Find these lines ..</user></div>
<div style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<user><br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: lime;">ExecStart=/sbin/runuser -l <USER> -c "/usr/bin/vncserver %i"</span><span style="color: white;">PIDFile=/home/<USER>/.vnc/%H%i.pid</span></code><br /><span style="color: #222222;">Replace ( Considering username as john )</span></user></div>
<div style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<user><br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">ExecStart=/sbin/runuser -l john -c "/usr/bin/vncserver %i"</span><br /><span style="color: lime;">PIDFile=/home/john/.vnc/%H%i.pid</span></code><br /><span style="color: #222222;">If you are creating for root user .</span></user></div>
<div style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<user><br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">ExecStart=/sbin/runuser -l </span><span style="color: lime;">root </span><span style="color: white;">-c "/usr/bin/vncserver %i"</span><br /><span style="color: white;">PIDFile=/root/.vnc/%H%i.pid</span></code><br /><strong style="color: #222222;">Step 4 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> Reload systemd for changes.</span></user></div>
<div style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<user><br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@krizna ~]# systemctl </span><span style="color: lime;">daemon-reload</span></code><br /><strong style="color: #222222;">Step 5 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> Create VNC password for the user .</span></user></div>
<div style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<user><br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@</span><span style="color: white;">hackthesec </span><span style="color: white;">~]# </span><span style="color: lime;">vncpasswd</span></code><br /><strong style="color: #222222;">Step 6 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> Enable and start the service using the below commands.</span><br /><span style="color: #222222;">Enable service at startup ( Permanent ).</span></user></div>
<div style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<user><br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@</span><span style="color: white;">hackthesec </span><span style="color: white;">~]# systemctl enable </span><span style="color: lime;">vncserver@:1.service</span></code><br /><span style="color: #222222;">Start the service .</span></user></div>
<div style="background-color: white; color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<user><br /><code style="background-color: #0e0e0e; border-radius: 5px; color: white; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;">[root@hackthesec ~]# systemctl start vncserver@:1.service</code><br /><strong>Step 7 </strong><strong>:</strong> Allow VNC service in firewall.</user></div>
<div style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<user><br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@</span><span style="color: white;">hackthesec </span><span style="color: white;">~]# firewall-cmd --permanent --add-service vnc-server<br />[root@</span><span style="color: white;">hackthesec </span><span style="color: white;">~]# </span><span style="color: lime;">systemctl restart firewalld.service</span></code><br /><span style="color: #222222;">Now you can able to connect VNC server using IP and Port ( Eg : 192.168.1.10:1 )</span></user></div>
<div style="background-color: white; color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<user><br /></user></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhMdCA7z_GFilu5Cs6j1a6cNCfeRBU3p5fmQqh08t1azT8VXWB5B-Cebvg0hfJCONu105aS9WZ9c52PuLLB7I60Rbix8_c3ubsTK42qcp45t_NFzjCbgAcRbeRbKoYwyIYVx5Tv9S8tDuIn/s1600/install-vnc-server-centos-7_www.hackthesec.co.in.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhMdCA7z_GFilu5Cs6j1a6cNCfeRBU3p5fmQqh08t1azT8VXWB5B-Cebvg0hfJCONu105aS9WZ9c52PuLLB7I60Rbix8_c3ubsTK42qcp45t_NFzjCbgAcRbeRbKoYwyIYVx5Tv9S8tDuIn/s1600/install-vnc-server-centos-7_www.hackthesec.co.in.jpg" /></a></div>
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<div style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<user><span style="color: #222222;">You can use VNC client like </span><a href="http://www.tightvnc.com/" rel="nofollow" style="color: #0f4884; text-decoration: none;" title="TightVNC">Tightvnc viewer</a><span style="color: #222222;"> and </span><a href="https://www.realvnc.com/" rel="nofollow" style="color: #0f4884; text-decoration: none;" title="realvnc viewer">Realvnc viewer</a><span style="color: #222222;"> to connect Server.</span><br /><span style="color: #222222;">For additional users create files with different ports ( Refer Step 2 )</span><strong><span style="color: red;">vncserver@:2.service</span></strong><span style="color: #222222;"> by copying example config file and continue the steps 3,4,5 and 6 by replacing service name. Please make sure you logged in as that particular user for creating vnc password ( Step 5 ).</span></user></div>
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Additional Commands :</h3>
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<user></user></div>
<div style="background-color: white; color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
 To stop VNC service .<br />
<code style="background-color: #0e0e0e; border-radius: 5px; color: white; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;">[root@hackthesec ~]# systemctl stop vncserver@:1.service</code><br />
 To disable VNC service from startup ( permanent ).</div>
<div style="background-color: white; color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
<br />
<code style="background-color: #0e0e0e; border-radius: 5px; color: white; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;">[root@hackthesec ~]# systemctl disable vncserver@:1.service</code><br />
To stop firewall ( For troubleshooting ).</div>
<div style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">
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<code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@krizna ~]# systemctl</span><span style="color: lime;"> stop firewalld.service<br /><br /></span><a href="http://www.hackthesec.co.in/" style="color: #999999; text-decoration: none;">Hack The Security</a><br style="color: lime;" /><a href="https://www.twitter.com/hackthesecurity" style="color: #999999; text-decoration: none;">Hack The Security Twitter</a><br style="color: lime;" /><a href="http://facebook.com/htsecu" style="color: #999999; text-decoration: none;">Hack The Security Facebook</a></code></div>
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<user><br /></user></div>
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How to install VNC server on Centos 7

VNC server is used to connect and control desktop environment of the server from remote clients. VNC viewer is used on remote computer to ...

How to setup FTP server on centos 7 ( VSFTP )

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<span style="background-color: white; color: #222222; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">FTP server is used to exchange files between computers over network . This guide helps you to setup ftp server on centos 7 . This guide contains configuration steps for both FTP and SFTP as well as user creation . Here i’ve used VSFTP package which is secure and less vulnerable .</span><br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh8sgDFsdT2-6ibob-V7LU1f1pGVI-HlDBDGWTeG4AaIfixz9vJlEUDp5vUVY9CZD_GXxp-3wN4OZwzjXq2jyJKXOOyXmkR-885QKJ349qlBMn07qZQ0sxAfb7pOvIDBiPkRy3HYq8S2k7R/s1600/Vsftpd-on-CentOS_ww.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="426" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh8sgDFsdT2-6ibob-V7LU1f1pGVI-HlDBDGWTeG4AaIfixz9vJlEUDp5vUVY9CZD_GXxp-3wN4OZwzjXq2jyJKXOOyXmkR-885QKJ349qlBMn07qZQ0sxAfb7pOvIDBiPkRy3HYq8S2k7R/s640/Vsftpd-on-CentOS_ww.hackthesec.co.in.png" width="640" /></a></div>
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<span style="color: red;"><span style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">1. </span>FTP Server<br style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;" /><span style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">2. </span>SFTP Server<br style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;" /><span style="background-color: white; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 16px; line-height: 30px;">3. </span>User creation</span><br />
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<span style="color: #0b5394;">Setup FTP server on centos 7</span><span style="color: #222222;"><a href="https://www.blogger.com/null" name="FTP"></a></span></h1>
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<strong style="color: #222222;">Step 1 :</strong><span style="color: #222222;"> Update your repository and install <b>VSFTPD </b>package .</span></div>
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<span style="color: #222222;"><br /></span><code style="background-color: #0e0e0e; border-radius: 5px; color: white; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;">[root@hackthesec ~]# yum check-update<br />[root@hackthesec ~]# yum -y install vsftpd</code><br /><strong style="color: #222222;">Step 2 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> After installation you can find </span><strong><span style="color: red;">/etc/vsftpd/vsftpd.conf</span></strong><span style="color: #222222;"> file which is the main configuration file for VSFTP.</span><br /><span style="color: #222222;">Take a backup copy before making changes .</span></div>
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# mv /etc/</span><span style="color: lime;">vsftpd</span><span style="color: white;">/vsftpd.conf /etc/vsftpd/vsftpd.conf.org</span></code></div>
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<span style="color: #222222; font-size: large;">Now open the file and make changes as below</span><br />
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; color: white; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;">[root@hackthesec ~]# nano /etc/vsftpd/vsftpd.conf</code></div>
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<span style="font-size: large;"><span style="color: #222222;">Find this line </span><strong><span style="color: red;">anonymous_enable=YES</span></strong><span style="color: #222222;"> ( Line no : 12 ) and change value to NO to disable anonymous FTP access.</span></span><br />
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; color: white; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;">anonymous_enable=NO</code></div>
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<span style="font-size: large;">Uncomment the below line ( Line no : 100 ) to restrict users to their home directory.</span><br />
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; color: white; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;">chroot_local_user=YES</code></div>
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<span style="font-size: large;">and add the below lines at the end of the file to enable passive mode and allow chroot writable.</span><br />
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; color: white; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;">allow_writeable_chroot=YES<br />pasv_enable=Yes<br />pasv_min_port=40000<br />pasv_max_port=40100</code><br /><strong>Step 3 </strong><strong>:</strong> Now restart vsftpd service and make it start automatically after reboot.</div>
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# systemctl </span><span style="color: lime;">restart </span><span style="color: white;">vsftpd.service</span><br /><span style="color: white;">[root@hackthesec ~]# </span><span style="color: lime;">systemctl enable vsftpd.service</span></code><br /><strong style="color: #222222;">Step 4 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> Add FTP service in firewall to allow ftp ports .</span></div>
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# </span><span style="color: lime;">firewall-cmd --permanent --add-service=ftp</span><br /><span style="color: white;">[root@hackthesec ~]# firewall-cmd --reload</span></code><br /><strong style="color: #222222;">Step 5 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> Setup SEinux to allow ftp access to the users home directories .</span></div>
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# setsebool </span><span style="color: lime;">-P ftp_home_dir on</span></code><br /><strong style="color: #222222;">Step 6 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> Now create an User for ftp access. Here</span><span style="color: red;"> <strong>/sbin/nologin</strong></span><span style="color: #222222;"> shell is used to prevent shell access to the server .</span></div>
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# useradd </span><span style="color: lime;">-m dave -s /sbin/nologin</span><br /><span style="color: white;">[root@hackthesec ~]# passwd dave</span></code></div>
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<span style="color: #222222;">Now user dave can able to login ftp on port 21 .</span><br />
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<br />You can <a href="https://filezilla-project.org/" rel="nofollow" style="color: #0f4884; text-decoration: none;" title="Filezilla">filezilla</a> or <a href="http://winscp.net/eng/download.php" rel="nofollow" style="color: #0f4884; text-decoration: none;" title="Winscp download">winscp</a> client for accessing files.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEim_29sfoA7aGhZnCZsbVJFWuHP5fVUNiuSkmcUEflO9L24ul4MAUHZVUz1N4AkGndvjVKwk3pYu_Swm-FxTbWQ6sWEuMB2DVrNaFiFVh0LOWgB2adtTOSTX4MT-3VjPWug705c2DaYnoZg/s1600/Setup-ftp-server-centos-7_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/AVvXsEim_29sfoA7aGhZnCZsbVJFWuHP5fVUNiuSkmcUEflO9L24ul4MAUHZVUz1N4AkGndvjVKwk3pYu_Swm-FxTbWQ6sWEuMB2DVrNaFiFVh0LOWgB2adtTOSTX4MT-3VjPWug705c2DaYnoZg/s1600/Setup-ftp-server-centos-7_www.hackthesec.co.in.png" /></a></div>
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<span style="color: #0b5394;">SFTP server</span><span style="color: #222222;"><a href="https://www.blogger.com/null" name="SFTP"></a></span></h1>
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<span style="color: #222222;">SFTP ( Secure File Transfer Protocol ) is used to encrypt connections between clients and the FTP server. It is highly recommended to use SFTP because data is transferred over encrypted connection using SSH-tunnel on </span><span style="color: red;"><strong>port 22 </strong>.</span><br /><span style="color: #222222;">Basically we need openssh-server package to enable SFTP .</span><br /><span style="color: #222222;">Install openssh-server package, if its not already installed.</span></div>
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# yum -y install </span><span style="color: lime;">openssh-server</span></code><br /><strong style="color: #222222;">Step 7 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> Create a separate group for FTP access.</span></div>
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# groupadd </span><span style="color: lime;">ftpaccess</span></code><br /><strong style="color: #222222;">Step 8 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> Now open </span><strong><span style="color: red;">/etc/ssh/sshd_config</span></strong><span style="color: #222222;"> file and make changes as below.</span><br /><span style="color: #222222;">Find and comment the below line ( Line no : 147 ).</span></div>
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">#Subsystem sftp /usr/libexec/openssh/</span><span style="color: lime;">sftp-server</span></code></div>
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<span style="color: #222222;">and add these lines below.</span><br />
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">Subsystem sftp internal-sftp</span><br /><span style="color: lime;">Match group ftpaccess</span><span style="color: white;">ChrootDirectory %h</span><br /><span style="color: white;">X11Forwarding no</span><br /><span style="color: lime;">AllowTcpForwarding no</span><span style="color: white;">ForceCommand internal-sftp</span></code><br /><strong style="color: #222222;">Step 9 </strong><strong style="color: #222222;">:</strong><span style="color: #222222;"> Now restart sshd service.</span></div>
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# </span><span style="color: lime;">systemctl restart sshd</span></code><span style="color: #222222;">Now your SFTP server is configured and ready .</span></div>
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<span style="color: #0b5394;">User creation</span><span style="color: #222222;"><a href="https://www.blogger.com/null" name="user"></a></span></h1>
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<strong>Step 10 </strong><strong>:</strong> Create user jack with /sbin/nologin shell and ftpaccess group</div>
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# </span><span style="color: lime;">useradd -m jack -s /sbin/nologin -g ftpaccess</span><br /><span style="color: white;">[root@hackthesec ~]# passwd jack</span></code></div>
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<span style="color: #222222;">Now assign root ownership for the home directory for chroot access and modify permission.</span><br />
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# chown root /home/jack<br />[root@hackthesec ~]# </span><span style="color: lime;">chmod 750 /home/jack</span></code></div>
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<span style="color: #222222;">Create a directory </span><strong style="color: #222222;">www</strong><span style="color: #222222;"> inside home directory for writing and modify ownership .</span><br />
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# mkdir /home/jack/www<br />[root@hackthesec ~]# chown </span><span style="color: lime;">jack:ftpaccess /home/jack/www</span></code><br /><span style="color: #222222;">Now jack can use both ftp and sftp services . He can upload files in </span><span style="color: red;"><strong>www</strong> </span><span style="color: #222222;">directory .</span></div>
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If you are going to use FTP and SFTP together in the same server, you should follow above steps while creating users . For existing users add them to ftpaccess and make below changes.</div>
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<br /><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: white;">[root@hackthesec ~]# usermod </span><span style="color: lime;">dave -g ftpaccess</span><br /><span style="color: white;">[root@hackthesec ~]# chown root /home/dave</span><br /><span style="color: white;">[root@hackthesec ~]# chmod </span><span style="color: lime;">750 /home/dave</span><br /><span style="color: white;">[root@hackthesec ~]# mkdir /home/dave/www</span><br /><span style="color: white;">[root@hackthesec ~]# </span><span style="color: lime;">chown dave:ftpaccess /home/dave/www</span></code><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: lime;"><br /></span></code><code style="background-color: #0e0e0e; border-radius: 5px; display: block; font-family: Verdana, 'MS Sans Serif', sans-serif, serif; font-size: 14px; line-height: 25px; padding: 4px;"><span style="color: lime;"><a href="http://www.hackthesec.co.in/">Hack The Security</a><br /><a href="https://www.twitter.com/hackthesecurity">Hack The Security Twitter</a><br /><a href="http://facebook.com/htsecu">Hack The Security Facebook</a></span></code></div>
</div>

How to setup FTP server on centos 7 ( VSFTP )

FTP server is used to exchange files between computers over network . This guide helps you to setup ftp server on centos 7 . This guide con...

How to setup mail server on centos 7

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<h1 style="background-color: white; clear: both; font-stretch: normal; height: auto; margin: 0px; padding: 0px; text-align: center; width: 614px;">
<span style="color: #990000; font-family: Trebuchet, Trebuchet MS, Arial, Verdana, sans-serif; font-size: large;"><span style="line-height: 30px;"><u>Setup mail server on centos 7</u></span></span></h1>
<h1 style="background-color: white; clear: both; color: #333333; font-family: Trebuchet, 'Trebuchet MS', Arial, Verdana, sans-serif; font-size: 30px; font-stretch: normal; font-weight: normal; height: auto; line-height: 31px; margin: 0px; padding: 0px; text-align: left; width: 614px;">
<span style="color: #222222; font-size: 16px; line-height: 30px;">This article helps you to install and configure basic mail server on </span><a href="http://www.hackthesec.co.in/search/label/Centos" style="color: #0f4884; font-size: 16px; line-height: 30px; text-decoration: none;" title="Centos">Centos</a><span style="color: #222222; font-size: 16px; line-height: 30px;"> 7. Here i have used Postfix for SMTP, Dovecot for POP/IMAP and Dovecot SASL for SMTP AUTH.</span></h1>
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<span style="color: #222222; font-family: trebuchet, 'trebuchet ms', arial, verdana, sans-serif; font-size: 16px; line-height: 30px;">Before proceeding please make sure you have assigned static IP for the server and have internet connectivity for installing packages.</span></div>
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                                <a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwXFjlAbKP-BbS_imp_3im9swmB_1h-YvwnJ9adp3dLHRZ8SnhttbxG5pHeSzoLgYS1-xSDzZRkhdzDCgkfeg1k4YK4AC19sZy8_R90QH-NNjOMo2IOvktIgpRdZ1fbp2Ti2SOaCOvx5mV/s1600/mailserver-with-virtual-users-and-domains-using-postfix-and-dovecot-in-centos-6+_www.hackthesec.co.in.png" imageanchor="1"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiwXFjlAbKP-BbS_imp_3im9swmB_1h-YvwnJ9adp3dLHRZ8SnhttbxG5pHeSzoLgYS1-xSDzZRkhdzDCgkfeg1k4YK4AC19sZy8_R90QH-NNjOMo2IOvktIgpRdZ1fbp2Ti2SOaCOvx5mV/s1600/mailserver-with-virtual-users-and-domains-using-postfix-and-dovecot-in-centos-6+_www.hackthesec.co.in.png" /></a></div>
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<span style="color: #0b5394; font-family: trebuchet, trebuchet ms, arial, verdana, sans-serif; font-size: large;"><span style="line-height: 30px;"><b><u>Setup mail server on centos 7</u></b></span></span></div>
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<span style="color: #222222; font-family: Georgia, Times New Roman, serif; font-size: large;"><span style="line-height: 30px;">1. Installing packages</span></span></div>
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<span style="color: #222222; font-family: trebuchet, trebuchet ms, arial, verdana, sans-serif; font-size: large;"><span style="line-height: 30px;">2. Postfix configuration</span></span></div>
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<span style="color: #222222; font-family: trebuchet, trebuchet ms, arial, verdana, sans-serif; font-size: large;"><span style="line-height: 30px;">3. Dovecot configuration</span></span></div>
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<span style="color: #222222; font-family: trebuchet, trebuchet ms, arial, verdana, sans-serif; font-size: large;"><span style="line-height: 30px;">4. User creation</span></span></div>
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<div style="font-family: trebuchet, 'trebuchet ms', arial, verdana, sans-serif; line-height: 30px;">
<b><u><span style="color: #0b5394; font-size: large;">Step 1: Installing packages</span></u></b></div>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Step 1 : Assign hostname for the server using the below command</span></span><span style="color: #222222; font-family: Verdana, Geneva, sans-serif; font-size: 15px; line-height: 26px;">.</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: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;">[root@hackthesec~]# hostnamectl set-hostname mail.hackthesec.co.in</span></span><span style="color: #222222; font-family: trebuchet, trebuchet ms, arial, verdana, sans-serif;"><span style="line-height: 30px; white-space: normal;">
</span></span></pre>
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<span style="font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><span style="color: #222222;">Step 2 : Make a host entry with your IP in </span><span style="color: #990000;"><b>/etc/hosts</b> </span><span style="color: #222222;">file.</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-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: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;">172.27.0.51 mail.hackthesec.co.in</span></span></pre>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Step 3 : Now start installing 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="font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: white;">[root@hackthesec~]# yum -y </span><span style="color: lime;">install postfix dovecot</span></span></span></pre>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">After package installation continue with postfix configuration.</span></span></div>
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<span style="color: #0b5394; font-family: trebuchet, trebuchet ms, arial, verdana, sans-serif; font-size: large;"><span style="line-height: 30px;"><b><u>Step 2 : Postfix configuration</u></b></span></span></div>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">First create SSL certificate for encryption.</span></span></div>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Step 4: Follow the below steps one by one for creation</span></span><span style="color: #222222; font-family: Verdana, Geneva, sans-serif; font-size: 15px; line-height: 26px;">.</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: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;">[root@hackthesec ~]# mkdir /etc/postfix/ssl
[root@</span></span><span style="color: white; font-family: 'Trebuchet MS', sans-serif; font-size: medium; line-height: 15.6px;">hackthesec</span><span style="color: white; font-family: 'Trebuchet MS', sans-serif; font-size: medium; line-height: 15.6px;"> ~]# cd /etc/postfix/ssl</span>
<span style="color: white; font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;">[root@</span></span><span style="color: white; font-family: 'Trebuchet MS', sans-serif; font-size: medium; line-height: 15.6px;">hackthesec</span><span style="color: white; font-family: 'Trebuchet MS', sans-serif; font-size: medium; line-height: 15.6px;"> ssl]# openssl genrsa -des3 -out server.key 2048</span>
<span style="color: white; font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;">[root@</span></span><span style="color: white; font-family: 'Trebuchet MS', sans-serif; font-size: medium; line-height: 15.6px;">hackthesec</span><span style="color: white; font-family: 'Trebuchet MS', sans-serif; font-size: medium; line-height: 15.6px;"> ssl]# openssl rsa -in server.key -out server.key.insecure</span>
<span style="color: white; font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;">[root@</span></span><span style="color: white; font-family: 'Trebuchet MS', sans-serif; font-size: medium; line-height: 15.6px;">hackthesec</span><span style="color: white; font-family: 'Trebuchet MS', sans-serif; font-size: medium; line-height: 15.6px;"> ssl]# mv server.key server.key.secure</span>
<span style="color: white; font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;">[root@</span></span><span style="color: white; font-family: 'Trebuchet MS', sans-serif; font-size: medium; line-height: 15.6px;">hackthesec</span><span style="color: white; font-family: 'Trebuchet MS', sans-serif; font-size: medium; line-height: 15.6px;"> ssl]# mv server.key.insecure server.key</span></pre>
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<span style="font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><span style="color: #222222;">Leave blank for </span><b><span style="color: #990000;">A challenge password []</span></b><span style="color: #222222;"> value in the below step.</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-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="font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: white;">[root@hackthesec ssl]# openssl req -new -key </span><span style="color: lime;">server.key -out server.csr</span><span style="color: white;">
[root@hackthesec ssl]# openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt</span></span></span></pre>
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<div>
<span style="font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><span style="color: #222222;">Step 5 : Now open</span><span style="color: #990000;"><b> /etc/postfix/main.cf</b></span><span style="color: #222222;"> file for changes.</span></span></span></div>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Find and uncomment the below lines</span></span><span style="color: #222222; font-family: Verdana, Geneva, sans-serif; font-size: 15px; line-height: 26px;">.</span></div>
<div style="color: black; font-family: 'Times New Roman'; line-height: normal;">
</div>
</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: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;">#inet_interfaces = localhost #---> line no 116
#mydestination = $myhostname, localhost.$mydomain, localhost #--> line no 164</span></span></pre>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">and add below lines at the end of the file. change <b>myhostname </b>and <b>mydomain </b>values with yours and <b>home_mailbox</b> value to your desired directory. Here it will store mails in the users home directory (Eg: /home/john/mail ).</span></span></div>
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<pre class="xtypo_info" style="background: url("assets/shadow.png") 50% 100% repeat-x rgb(245, 245, 245); border-radius: 4px; border: 1px solid rgb(204, 204, 204); box-shadow: rgb(204, 204, 204) 0px 0px 3px; box-sizing: border-box; color: #333333; font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; font-size: 13px; font-stretch: normal; line-height: 1.42857; margin-bottom: 10px; overflow: auto; padding: 9.5px; tab-size: 4; text-shadow: rgb(255, 255, 255) 0px 1px 0px; white-space: pre-wrap; word-break: break-all; word-wrap: break-word;">myhostname = mail.hackthesec.co.in
mydomain = hackthesec.co.in
myorigin = $mydomain
home_mailbox = mail/
mynetworks = 127.0.0.0/8
inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_local_domain =
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
smtpd_sasl_auth_enable = yes
smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
smtp_tls_security_level = may
smtpd_tls_security_level = may
smtp_tls_note_starttls_offer = yes
smtpd_tls_loglevel = 1
smtpd_tls_key_file = /etc/postfix/ssl/server.key
smtpd_tls_cert_file = /etc/postfix/ssl/server.crt
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom</pre>
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<span style="font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><span style="color: #222222;">Step 6 : Open </span><b><span style="color: #990000;">/etc/postfix/master.cf</span></b><span style="color: #222222;"> file, add the below lines after "</span><span style="color: #990000;">smtp inet n – n – – smtpd</span><span style="color: #222222;">" line</span></span></span><span style="color: #222222; font-family: Verdana, Geneva, sans-serif; font-size: 15px; line-height: 26px;">.</span></div>
<div style="color: #222222; font-family: trebuchet, 'trebuchet ms', arial, verdana, sans-serif; line-height: 30px;">
<pre class="xtypo_info" style="background: url("assets/shadow.png") 50% 100% repeat-x rgb(245, 245, 245); border-radius: 4px; border: 1px solid rgb(204, 204, 204); box-shadow: rgb(204, 204, 204) 0px 0px 3px; box-sizing: border-box; color: #333333; font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; font-size: 13px; font-stretch: normal; line-height: 1.42857; margin-bottom: 10px; overflow: auto; padding: 9.5px; tab-size: 4; text-shadow: rgb(255, 255, 255) 0px 1px 0px; white-space: pre-wrap; word-break: break-all; word-wrap: break-word;">submission     inet  n       -       n       -       -       smtpd
  -o syslog_name=postfix/submission
  -o smtpd_sasl_auth_enable=yes
  -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject
  -o milter_macro_daemon_name=ORIGINATING
smtps     inet  n       -       n       -       -       smtpd
  -o syslog_name=postfix/smtps
  -o smtpd_sasl_auth_enable=yes
  -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject
  -o milter_macro_daemon_name=ORIGINATING
Now check the configuration using postfix check command.
Step 7 : Now configure Dovecot SASL for SMTP Auth. Open /etc/dovecot/conf.d/10-master.conf file, find “# Postfix smtp-auth” line ( line no:95 ) and add the below lines.
# Postfix smtp-auth
unix_listener /var/spool/postfix/private/auth {mode = 0660
user = postfix
group = postfix
}</pre>
</div>
</div>
<div style="font-family: trebuchet, 'trebuchet ms', arial, verdana, sans-serif; line-height: 30px;">
<div style="font-family: 'Times New Roman'; line-height: normal;">
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<span style="font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Now check the configuration using <b><span style="color: #990000;">postfix check</span></b> command.</span></span></div>
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<span style="font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Step 7 : Now configure Dovecot SASL for SMTP Auth. Open <b><span style="color: #990000;">/etc/dovecot/conf.d/10-master.conf</span></b> file, find "<b><span style="color: #990000;"># Postfix smtp-auth</span></b>" line ( line no:95 ) and add the below lines.</span></span></div>
</div>
</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="font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: white;"># Postfix smtp-auth
</span><span style="color: lime;">unix_listener /var/spool/postfix/private/auth {mode = 0660
</span><span style="color: white;">user = postfix
group = postfix
}</span></span></span></pre>
</div>
<div>
<span style="font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><span style="color: #222222;">Step 8 : Open </span><b><span style="color: #990000;">/etc/dovecot/conf.d/10-auth.conf</span></b><span style="color: #222222;"> file, find "<b>auth_mechanisms = plain</b>" ( Line no: 100 ) and add login to the value like below.</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-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="font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: lime;">auth_mechanisms</span><span style="color: white;"> = plain login</span></span></span></pre>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Step 9 : Postfix configuration is over. Now restart both postfix and dovecot services and enable auto start</span></span><span style="color: #222222; font-family: Verdana, Geneva, sans-serif; line-height: normal;"><span style="font-size: 15px; line-height: 26px;">.</span></span></div>
<div style="color: black; font-family: 'Times New Roman'; line-height: normal;">
</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="font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: orange;">[root@mail ~]# systemctl restart postfix
</span><span style="color: white;">[root@mail ~]# systemctl enable postfix
</span><span style="color: lime;">[root@mail ~]# systemctl restart dovecot
</span><span style="color: orange;">[root@mail ~]# systemctl enable dovecot</span></span></span></pre>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Step 10 : Add the firewall rules to allow <b>25, 587 and 465</b> ports</span></span><span style="color: black; font-family: 'Times New Roman'; font-size: 15px; line-height: 26px;">.</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="font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: white;">[root@mail ~]# firewall-cmd --permanent --add-service=smtp
</span><span style="color: lime;">[root@mail ~]# firewall-cmd --permanent --add-port=587/tcp
</span><span style="color: white;">[root@mail ~]# firewall-cmd --permanent --add-port=465/tcp
</span><span style="color: orange;">[root@mail ~]# firewall-cmd --reload</span></span></span></pre>
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<span style="font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><span style="color: #222222;">Now start testing connectivity for each ports 25,587 and 465 using telnet and make sure you are getting </span><span style="color: #990000;"><b>AUTH PLAIN LOGIN</b></span><span style="color: #222222;"> line after issuing <b>ehlo mail.hackthesec.co.in </b>command in telnet</span></span></span><span style="color: black; font-family: 'Times New Roman'; font-size: 15px; line-height: 26px;">.</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="font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: white;">[root@mail ~]# </span><span style="color: lime;">telnet mail.hackthesec.co.in 465</span><span style="color: white;">
Trying 172.27.0.51...
Connected to mail.hackthesec.co.in.
Escape character is '^]'.
</span><span style="color: orange;">220 mail.hackthesec.co.in ESMTP Postfix
</span><span style="color: white;">ehlo mail.hackthesec.co.in</span></span></span></pre>
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<span style="color: #0b5394; font-family: Verdana, Geneva, sans-serif; font-size: large;"><span style="line-height: 26px;"><b><u>Step 3 : Dovecot configuration</u></b></span></span></div>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Start configuring Dovecot</span></span><span style="color: black; font-family: 'Times New Roman'; font-size: 15px; line-height: 26px;">.</span></div>
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<span style="font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><span style="color: #222222;">Step 11 : Open </span><b><span style="color: #990000;">/etc/dovecot/conf.d/10-mail.conf</span></b><span style="color: #222222;"> file, find <b>#mail_location =</b> (line no : 30 ) and add the same directory which is given to home_mailbox in the postfix config file ( Step 5)</span></span></span><span style="font-size: 15px; line-height: 26px;">.</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="font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: white;">mail_location = </span><span style="color: lime;">maildir:~/mail</span></span></span></pre>
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<span style="font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><span style="color: #222222;">Step 12 : Open </span><b><span style="color: #990000;">/etc/dovecot/conf.d/20-pop3.conf</span></b><span style="color: #222222;"> file, find and uncomment the below line ( line no : 50 )</span></span></span><span style="color: black; font-family: 'Times New Roman'; font-size: 15px; line-height: 26px;">.</span></div>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Step 13 : Restart dovecot service</span></span><span style="color: black; font-family: 'Times New Roman'; font-size: 15px; line-height: 26px;">.</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="font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: white;">[root@mail ~]# </span><span style="color: lime;">systemctl restart dovecot</span></span></span></pre>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Step 14 : Add firewall rules to allow 110,143,993 and 995</span></span><span style="color: black; font-family: 'Times New Roman'; font-size: 15px; line-height: 26px;">.</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="font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: lime;">[root@mail ~]# firewall-cmd --permanent --add-port=110/tcp
</span><span style="color: white;">[root@mail ~]# firewall-cmd --permanent --add-service=pop3s
</span><span style="color: orange;">[root@mail ~]# firewall-cmd --permanent --add-port=143/tcp
</span><span style="color: white;">[root@mail ~]# firewall-cmd --permanent --add-service=imaps
[root@mail ~]# firewall-cmd --reload</span></span></span></pre>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Check the connectivity for the ports 110,143,993 and 995 using telnet</span></span><span style="color: black; font-family: 'Times New Roman'; font-size: 15px; line-height: 26px;">.</span></div>
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<span style="color: #0b5394; font-family: Verdana, Geneva, sans-serif; font-size: large;"><span style="line-height: 26px;"><b><u>Step 4 : User creation</u></b></span></span></div>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Now create user for testing .</span></span></div>
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<span style="font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;"><span style="color: #222222;">Step 15 : Create user with </span><b><span style="color: #990000;">/sbin/nologin</span></b><span style="color: #222222;"> shell to restrict login access</span></span></span><span style="font-size: 15px; line-height: 26px;">.</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="font-family: Trebuchet MS, sans-serif; font-size: medium;"><span style="line-height: 15.6px;"><span style="color: lime;">[root@mail ~]# useradd -m john -s /sbin/nologin
</span><span style="color: white;">[root@mail ~]# passwd hackthesec</span></span></span></pre>
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<span style="color: #222222; font-family: Verdana, Geneva, sans-serif;"><span style="font-size: 15px; line-height: 26px;">Mail server is ready now, Configure user in your mail client and test send/receive</span></span><span style="color: black; font-family: 'Times New Roman'; font-size: 15px; line-height: 26px;">.</span></div>
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<img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-KvSTpPDbIqW1IOfpC424M9kQxnYaFzCZG7wO9XNDKTPS6lEYN_6UsN5XZrRvlDCj2ypN4O0teETtY3z2W6_uQjDAuwDLbCahUN7hvCt4qktVwfYNjZWBzEYa5_4RNUY8qrkrzNCKQZm1/s640/Setup+mail+server+on+centos+7_www.hackthesec.co.in.png" /></div>
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<a href="http://www.hackthesec.co.in/">www.hackthesec.co.in</a></div>
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How to setup mail server on centos 7

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