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How to Install iRedMail (Mail Server) on CentOS 7 and RHEL 7

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<span style="color: red;"><u><i>Install iRedMail (Mail Server) on CentOS 7 & RHEL 7</i></u></span></h1>
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<span style="background-color: white; text-align: justify;"><span style="font-family: "pt" serif , serif; font-size: large;"><span style="line-height: 22.4px;">iRedMail is a full-featured <a href="http://www.hackthesec.co.in/search/label/Mail_Server" target="_blank">mail server</a> solution, it provides basic features like unlimited virtual mail accounts, POP3/IMAP/SMTP, AJAX webmail. Below are some highlights :</span></span></span><br />
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<strong>Highlight features</strong></div>
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<li style="color: #6a97bf; margin: 0px 0px 0.7em; padding: 0px; text-align: left;"><span style="color: #666666;"><a href="http://www.iredmail.org/features.html#supported_distro_arch" style="color: #00579c;">Works on 7 Major Linux/BSD Distributions</a></span></li>
<li style="color: #6a97bf; margin: 0px 0px 0.7em; padding: 0px; text-align: left;"><span style="color: #666666;"><a href="http://www.iredmail.org/features.html#fast_deployment" style="color: #00579c;">Fast Deployment, Low Maintenance, Unlimited Accounts</a></span></li>
<li style="color: #6a97bf; margin: 0px 0px 0.7em; padding: 0px; text-align: left;"><span style="color: #666666;"><a href="http://www.iredmail.org/features.html#supported_backends" style="color: #00579c;">Stores Mail Accounts in one of supported 4 backends: OpenLDAP, MySQL, MariaDB and PostgreSQL</a></span></li>
<li style="color: #6a97bf; margin: 0px 0px 0.7em; padding: 0px; text-align: left;"><span style="color: #666666;"><a href="http://www.iredmail.org/features.html#caldav_carddav" style="color: #00579c;">Calendar service (CalDAV) and Contact service (CardDAV)</a></span></li>
<li style="color: #6a97bf; margin: 0px 0px 0.7em; padding: 0px; text-align: left;"><span style="color: #666666;"><a href="http://www.iredmail.org/features.html#service_restrictions" style="color: #00579c;">Service Restrictions</a></span></li>
<li style="color: #6a97bf; margin: 0px 0px 0.7em; padding: 0px; text-align: left;"><span style="color: #666666;"><a href="http://www.iredmail.org/features.html#throttling" style="color: #00579c;">Sender & Recipient Throttling</a></span></li>
<li style="color: #6a97bf; margin: 0px 0px 0.7em; padding: 0px; text-align: left;"><span style="color: #666666;"><a href="http://www.iredmail.org/features.html#antispam" style="color: #00579c;">Anti-Spam & Anti-Virus</a></span></li>
<li style="color: #6a97bf; margin: 0px 0px 0.7em; padding: 0px; text-align: left;"><span style="color: #666666;"><a href="http://www.iredmail.org/features.html#webmail" style="color: #00579c;">WebMail: AJAX, Global LDAP Address Book, Vacation, Filter</a></span></li>
<li style="color: #6a97bf; margin: 0px 0px 0.7em; padding: 0px; text-align: left;"><span style="color: #666666;"><a href="http://www.iredmail.org/features.html#misc" style="color: #00579c;">Misc</a></span></li>
<li style="color: #6a97bf; margin: 0px 0px 0.7em; padding: 0px; text-align: left;"><span style="color: #666666;"><a href="http://www.iredmail.org/features.html#process" style="color: #00579c;">Main components and working process</a></span></li>
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<span style="background-color: white; font-family: "pt serif" , serif; font-size: 16px; line-height: 22.4px;">In this article we will demonstrate how to install and configure iRedMail on CentOS 7 & RHEL 7. </span></div>
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<li><span style="background-color: white; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit;"><span style="font-size: large;">   OS = CentOS 7 or RHEL 7</span></span></li>
<li><span style="background-color: white; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit;"><span style="font-size: large;">   Domain = hackthesec.co.in</span></span></li>
<li><span style="background-color: white; font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit;"><span style="font-size: large;">   Server Hostname = mail.hackthesec.co.in</span></span></li>
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<span style="background-color: white; font-family: "pt serif" , serif; font-size: 16px; line-height: 22.4px;"> In case if you want mails from your mail server to be delivered in inbox not in spam folder then update the DNS records like A & PTR  before installation and TXT ( SPF & DKIM ) after installation.</span></blockquote>
<h4 style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 24px; font-stretch: inherit; font-weight: 400; letter-spacing: -0.3px; line-height: 1.3em; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><span style="color: #0b5394;">Step:1 Set hostname and disable Selinux.</span></span></h4>
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Set the proper hostname using <span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">hostnamectl</span> command if it is not set.</div>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: monaco, 'courier new', 'dejavu sans mono', 'bitstream vera sans mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="color: white; font-size: large;">[root@hackthesec ~]# </span><span style="color: lime; font-size: large;">hostnamectl </span><span style="color: white; font-size: large;">set-hostname mail.hackthesec.co.in
[root@</span><span style="color: white; font-size: large;">hackthesec</span><span style="font-size: large;"><span style="color: white;"> ~]# </span><span style="color: lime;">hostname </span><span style="color: white;">-f</span></span><span style="color: white;">
</span><span style="color: white; font-size: large;">mail.hackthesec.co.in</span></pre>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">Update the <span style="color: #990000;">/etc/hosts</span> file</span></div>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); color: white; font-family: monaco, 'courier new', 'dejavu sans mono', 'bitstream vera sans mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: large;">127.0.0.1 mail.hackthesec.co.in localhost.localdomain localhost</span></pre>
<div style="background-color: white; border: 0px; font-family: 'pt serif', serif; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">Disable <span style="color: #990000;">Selinux</span></span></div>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: monaco, 'courier new', 'dejavu sans mono', 'bitstream vera sans mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="color: white; font-size: large;">[root@</span><span style="color: white; font-size: large;">hackthesec</span><span style="font-size: large;"><span style="color: white;"> ~]# </span><span style="color: lime;">setenforce </span><span style="color: white;">0</span></span></pre>
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<span style="font-size: large;">Edit the file /<span style="color: red;">etc/sysconfig/selinux</span> , set the parameter “<span style="border: 0px; font-family: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><span style="color: red;">SELINUX=disabled</span>”</span> , Reboot the server to disable selinux completely.</span></div>
<h4 style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 24px; font-stretch: inherit; font-weight: 400; letter-spacing: -0.3px; line-height: 1.3em; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><span style="color: #0b5394;">Step:2 Download the tar file of iRedmail.</span></span></h4>
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Download the latest version of iRedmail from their <span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><span style="border: 0px; color: #333399; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><a href="http://www.iredmail.org/download.html" style="border: 0px; color: #333399; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; outline: 0px; padding: 0px; text-decoration: none; transition-duration: 0.2s; transition-timing-function: ease; vertical-align: baseline;" target="_blank">Official Web Site</a></span></span> or use below wget command to download from terminal.</div>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="color: white; font-family: "monaco" , "courier new" , "dejavu sans mono" , "bitstream vera sans mono" , monospace; font-size: large; line-height: 19px; white-space: pre-wrap;">[root@</span><span style="color: white; font-family: "monaco" , "courier new" , "dejavu sans mono" , "bitstream vera sans mono" , monospace; font-size: large; line-height: 19px; white-space: pre-wrap;">hackthesec</span><span style="font-family: "monaco" , "courier new" , "dejavu sans mono" , "bitstream vera sans mono" , monospace; font-size: large; line-height: 19px; white-space: pre-wrap;"><span style="color: white;"> ~]# wget </span></span><span style="background-color: transparent; line-height: 19px; white-space: pre-wrap;"><span style="color: lime; font-family: "monaco" , "courier new" , "dejavu sans mono" , "bitstream vera sans mono" , monospace; font-size: large;">https://bitbucket.org/zhb/iredmail/downloads/iRedMail-0.9.4.tar.bz2</span></span></pre>
<h4 style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 24px; font-stretch: inherit; font-weight: 400; letter-spacing: -0.3px; line-height: 1.3em; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><span style="color: #0b5394;">Step:3 Extract the tar file & execute installation Script.</span></span></h4>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: monaco, 'courier new', 'dejavu sans mono', 'bitstream vera sans mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="color: white; font-size: large;">[root@</span><span style="color: white; font-size: large;">hackthesec</span><span style="color: white; font-size: large;"> ~]# ll</span><span style="color: white;">
</span><span style="color: white; font-size: large;">total 124
</span><span style="color: lime; font-size: large;">-rw-r--r-- 1 root root 126277 Feb 15 19:12 iRedMail-0.9.4.tar.bz2
</span><span style="color: white; font-size: large;">[root@</span><span style="color: white; font-size: large;">hackthesec</span><span style="color: white; font-size: large;"> ~]#</span><span style="color: white;">
</span><span style="color: white; font-size: large;">[root@</span><span style="color: white; font-size: large;">hackthesec</span><span style="font-size: large;"><span style="color: white;"> ~]# tar -jxvf </span><span style="color: lime;">iRedMail-0.9.4.tar.bz2</span></span><span style="color: white;">
</span><span style="color: white; font-size: large;">[root@</span><span style="color: white; font-size: large;">hackthesec</span><span style="color: white; font-size: large;"> ~]# cd iRedMail-0.9.4</span><span style="color: white;">
</span><span style="color: white; font-size: large;">[root@</span><span style="color: white; font-size: large;">hackthesec</span><span style="color: white; font-size: large;"> iRedMail-0.9.4]# </span><span style="font-size: large;"><span style="color: lime;">sh iRedMail.sh</span></span></pre>
<span style="background-color: white; font-family: "pt serif" , serif; font-size: 16px; line-height: 22.4px;">After couple of seconds , below screen will appear , Select yes and press enter.</span><br />
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<span style="background-color: white; font-family: "pt serif" , serif; font-size: 16px; line-height: 22.4px; text-align: left;">Define the folder or directory where users mailbox will be stored.</span></div>
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Select the web Server for iRedmail. Default is Nginx.</div>
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Select the database of your choice which will store domain names and mail accounts. In my case i am using MariaDB.</div>
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Define the domain name for your mail server. In my case domain name is “<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">hackthesec.co.in</span>”</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEibjnpbDxs_AgGmljeAKli1XaXjZjdi3-c5P_b7g23yXWkPSv3H8GgzGa_3TYd-qL2c_Wb1p20x7k2IqKbKkAq9h5qvvp7MvaY9XaPKKlWUzO_aEMll-G4UHgL-8ferdfoKVzgFQUxeOkeD/s1600/domain-name-for-iredmail_www.hackthesec.co.in.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="302" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEibjnpbDxs_AgGmljeAKli1XaXjZjdi3-c5P_b7g23yXWkPSv3H8GgzGa_3TYd-qL2c_Wb1p20x7k2IqKbKkAq9h5qvvp7MvaY9XaPKKlWUzO_aEMll-G4UHgL-8ferdfoKVzgFQUxeOkeD/s640/domain-name-for-iredmail_www.hackthesec.co.in.jpg" width="640" /></a></div>
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Set Password for postmaster account.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiNeobQl_pSqv3Ixucl7dz4hqrtTqROpuJ1fMBOZrFptLYVynR0ng8QoBWn-oTOMfbAQL5eOtbhuWDslmv6MqCfaOH4r9yjzZgSZFTE1iayTwtdAHlvNpJ_1aU2xSGlIH94mOB9B1aQaIx/s1600/postmaster-password-iredmail_www.hackthesec.co.in.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="314" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiNeobQl_pSqv3Ixucl7dz4hqrtTqROpuJ1fMBOZrFptLYVynR0ng8QoBWn-oTOMfbAQL5eOtbhuWDslmv6MqCfaOH4r9yjzZgSZFTE1iayTwtdAHlvNpJ_1aU2xSGlIH94mOB9B1aQaIx/s640/postmaster-password-iredmail_www.hackthesec.co.in.jpg" width="640" /></a></div>
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Select Optional Components of iRedmail installation</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh46zVNpsb-PeddYyDJPCohVvGe2C9b5ME5ATrxWE-2tpOnd2wb3F0RXNDP8KXd2vHqP1wBKZxkzPKBMIehoKTMAblo2Fjn9f-v4Cu6Nb_bj_GXP3WfO3kZbS0YEBOsZlWFE28DpHaSJ4Dc/s1600/components-iredmail_www.hackthesec.co.in.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="308" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh46zVNpsb-PeddYyDJPCohVvGe2C9b5ME5ATrxWE-2tpOnd2wb3F0RXNDP8KXd2vHqP1wBKZxkzPKBMIehoKTMAblo2Fjn9f-v4Cu6Nb_bj_GXP3WfO3kZbS0YEBOsZlWFE28DpHaSJ4Dc/s640/components-iredmail_www.hackthesec.co.in.jpg" width="640" /></a></div>
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<span style="background-color: white; font-family: "pt serif" , serif; font-size: 16px; line-height: 22.4px;">Press “</span><span style="background-color: white; border: 0px; font-family: "pt serif" , serif; font-size: 16px; font-stretch: inherit; font-weight: 600; line-height: 22.4px; margin: 0px; padding: 0px; vertical-align: baseline;">y</span><span style="background-color: white; font-family: "pt serif" , serif; font-size: 16px; line-height: 22.4px;">” to continue installation, Mail Server info & Credentials are kept in the file “</span><span style="background-color: white; border: 0px; font-family: "pt serif" , serif; font-size: 16px; font-stretch: inherit; font-weight: 600; line-height: 22.4px; margin: 0px; padding: 0px; vertical-align: baseline;">/root/iRedMail-0.9.4/config”</span><span style="background-color: white; font-family: "pt serif" , serif; font-size: 16px; line-height: 22.4px;">. Please keep this file in secure place.</span></div>
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<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="color: lime; font-family: "monaco" , "courier new" , "dejavu sans mono" , "bitstream vera sans mono" , monospace;"><span style="line-height: 19px; white-space: pre-wrap;">*************************************************************************
*****************************WARNING*************************************
*************************************************************************
*
* Below file contains sensitive information (username/password), please *
* do remember to *MOVE* it to a safe place after installation.  *
*          *
*    * /root/iRedMail-0.9.4/config
*         *
*************************************************************************
*****************************Review your settings************************
*************************************************************************

* Storage base directory:     /var/vmail
* Mailboxes:     /var/vmail/vmail1
* Daily backup of SQL/LDAP databases:  /var/vmail/backup
* Store mail accounts in:   MariaDB
* Web server:     Nginx
* First mail domain name:   hackthesec.co.in
* Mail domain admin:    postmaster@hackthesec.co.in
* Additional components:   iRedAdmin Roundcubemail SOGo Awstats Fail2ban

< Question > Continue? [y|N]y</span></span></pre>
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<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="color: lime; font-family: "monaco" , "courier new" , "dejavu sans mono" , "bitstream vera sans mono" , monospace;"><span style="line-height: 19px; white-space: pre-wrap;">*****************************************************************
*URL of Installed web applications:
*
* - Roundcube webmail: https://mail.hackthesec.co.in/mail
* - SOGo groupware: https://mail.hackthesec.co.in/SOGo/
*
* - Web admin panel (iRedAdmin): https://mail.hackthesec.co.in/iredadmin/
*
* You can login to above links with below credential:
*
* - Username: postmaster@hackthesec.co.in
* - Password: 123456
*
*
******************************************************************
* Congratulations, mail server setup completed successfully.
* Please read the below file for more information:
*
*   - /root/iRedMail-0.9.4/iRedMail.tips
*
* And it's sent to your mail account postmaster@hackthesec.co.in
*
**************************WARNING**********************************
*
*Please reboot your system to enable all mail services.
*
***************************************************************</span></span></pre>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
As per instructions , reboot the server to enable all mail services.</div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
Postfix mail logs and iRedmail logs are stored in “<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">/var/log/maillog</span>” and “<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">/var/log/iredapd/iredapd.log</span>” respectively.</div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; color: navy; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">Note :</span></span> Default administrator name is “postmaster@hackthesec.co.in”</div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
Following are the Important URLs after the Installation is completed , replace the domain name as per your setup in mentioned URLs.</div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">iRedAdmin – official web-based admin panel:</span></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; color: navy; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">https://mail.hackthesec.co.in/iredadmin/</span></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
Username: postmaster@<span style="line-height: 22.4px;">hackthesec.co.in</span>, password: 123456</div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">Roundcube webmail URL :</span></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; color: navy; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">http://mail.<span style="line-height: 22.4px;">hackthesec.co.in</span>/mail/</span></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">SOGo Groupware</span></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; color: navy; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">https://mail.<span style="line-height: 22.4px;">hackthesec.co.in</span>/SOGo/</span></div>
<h4 style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 24px; font-stretch: inherit; font-weight: 400; letter-spacing: -0.3px; line-height: 1.3em; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><span style="color: #0b5394;">Step:4 Create Users & domain from Admin Panel.</span></span></h4>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="color: #0b5394;"><span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"></span></span></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
To create users first login to admin panel. Use user name as “<span style="border: 0px; color: navy; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">postmaster@<domain></span>” and password that we set during installation.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJcYpK8BwQWIiTbkBoBRBKaMBI-E0KIKave2z9Y530XkSy6xQtOfxRhqFCoC6fN7AV9VHjCoOXO6o3bei9Lwdj7RFUJ4xwNhvjU38YeY8BbDs6cY5JeyGjiGdI17FXIlM286EINC5OVOTr/s1600/postmaster-login_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="238" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJcYpK8BwQWIiTbkBoBRBKaMBI-E0KIKave2z9Y530XkSy6xQtOfxRhqFCoC6fN7AV9VHjCoOXO6o3bei9Lwdj7RFUJ4xwNhvjU38YeY8BbDs6cY5JeyGjiGdI17FXIlM286EINC5OVOTr/s640/postmaster-login_www.hackthesec.co.in.png" width="640" /></a></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
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After Login Done. Create a user...</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyy1qP1_pVxGreLT11TIW6K4oyc52qwvf6aF_2H0MBh-BB4o5dcFuuVU0kd6iTFRbL79YCWppMxlbm0ShQixx8FG8TRnM2XQv-SfdUuWe9VqyQ3c0aleoD6GZLDwk122qSYBSSviOiqFro/s1600/usercreation_iredmail_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="332" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyy1qP1_pVxGreLT11TIW6K4oyc52qwvf6aF_2H0MBh-BB4o5dcFuuVU0kd6iTFRbL79YCWppMxlbm0ShQixx8FG8TRnM2XQv-SfdUuWe9VqyQ3c0aleoD6GZLDwk122qSYBSSviOiqFro/s640/usercreation_iredmail_www.hackthesec.co.in.png" width="640" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixnSEEKQ_dkk-fu0mJCPGUjqunJPVbtu0j0JqehuIEdk6CUqIhrNPHqi4iUVBcJrBF2Ww5E6Cx9-MGLp_eAQ2ljerJs73RFWmJIWy_tQlbi9BMz0FNDRyGHpVv8KjNoysgm7_xTXKRMhxF/s1600/useradd_iredmail_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="364" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixnSEEKQ_dkk-fu0mJCPGUjqunJPVbtu0j0JqehuIEdk6CUqIhrNPHqi4iUVBcJrBF2Ww5E6Cx9-MGLp_eAQ2ljerJs73RFWmJIWy_tQlbi9BMz0FNDRyGHpVv8KjNoysgm7_xTXKRMhxF/s640/useradd_iredmail_www.hackthesec.co.in.png" width="640" /></a></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><span style="color: #0b5394;">Add a new Domain :</span></span></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
From the admin Panel , Select “<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">Domain & accounts”</span> option and then click on Add domain</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9NOHRZqfdJd5O9Fej4Hh7D5Wtb2ySkZtgz-pzJ2HC9NiMbHpt0M16Mwbw7iG_udlY05jDj5LYRvP6-59RS67qg0AU4h1jxDmE3zT7vIdVfqtpG4OnVASqUPsnYYkC0DR_s36f78MypFMG/s1600/domain_add_iredmail_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="274" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9NOHRZqfdJd5O9Fej4Hh7D5Wtb2ySkZtgz-pzJ2HC9NiMbHpt0M16Mwbw7iG_udlY05jDj5LYRvP6-59RS67qg0AU4h1jxDmE3zT7vIdVfqtpG4OnVASqUPsnYYkC0DR_s36f78MypFMG/s640/domain_add_iredmail_www.hackthesec.co.in.png" width="640" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpR7CvL5hP9xLtgcfQA_vftp27r2-X8VxgTfxPyJYkAiEQwtyessqSRMIMiEva5Gu5DK5TomPNNWzBbrsNCbUsey-I3tftXnb1rbYiL55O3ioqC9dRmtdMvpLzMzW7-3R3LX4BPNKCX6iM/s1600/domain-add_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="360" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgpR7CvL5hP9xLtgcfQA_vftp27r2-X8VxgTfxPyJYkAiEQwtyessqSRMIMiEva5Gu5DK5TomPNNWzBbrsNCbUsey-I3tftXnb1rbYiL55O3ioqC9dRmtdMvpLzMzW7-3R3LX4BPNKCX6iM/s640/domain-add_www.hackthesec.co.in.png" width="640" /></a></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; font-family: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"><span style="color: #0b5394; font-size: large;">Step:5 Access Roundcube (Webmail).</span></span></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
Open the url in the browser “<span style="border: 0px; color: navy; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">https://mail.hackthesec.co.in/mail/</span>” , replace the domain name as per your setup.</div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<br /></div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<a href="http://www.hackthesec.co.in/" target="_blank">www.hackthesec.co.in</a><br />
<a href="https://www.twitter.com/hackthesecurity" target="_blank">HackTheSecTwitter</a></div>
</div>
</div>

How to Install iRedMail (Mail Server) on CentOS 7 and RHEL 7

Install iRedMail (Mail Server) on CentOS 7 & RHEL 7 iRedMail is a full-featured mail server solution, it provides basic features ...

Disabling the TRACE method in Apache2

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<h1 class="western">
<span style="color: #990000;"><span style="font-family: istok web, sans-serif; font-size: x-large;"><u><i>Disabling
the TRACE method in Apache2</i></u></span></span></h1>
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<span style="color: black;"><span style="font-family: Georgia, Times New Roman, serif; font-size: large;"><span style="font-weight: normal;">By
default, </span><a href="http://www.hackthesec.co.in/search/label/Apache" target="_blank">Apache2 </a><span style="font-weight: normal;">supports the </span>HTTP <span style="font-weight: normal;">TRACE method, which could expose
your server to certain Cross-Site Scripting attacks. In this
tutorial, I will show you how to check for TRACE support on your
<a href="http://www.hackthesec.co.in/search/label/Apache" target="_blank">Apache2 </a>server using curl, and then switch it off if it is enabled.</span></span></span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsqRHtym_vFI-Wol6O32jFlSlnzFqddnTbPadAk3_dpHLmRX-4f0htUdDxAB61V39wWlI3eP7uSarHbzIUwrooJjuua1rUYNSd8TkLqpeWjqEfKLSdBeKFSX1eBnqeuigU5yUPWbMTYCa6/s1600/apache_asf_logo_url_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="129" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsqRHtym_vFI-Wol6O32jFlSlnzFqddnTbPadAk3_dpHLmRX-4f0htUdDxAB61V39wWlI3eP7uSarHbzIUwrooJjuua1rUYNSd8TkLqpeWjqEfKLSdBeKFSX1eBnqeuigU5yUPWbMTYCa6/s320/apache_asf_logo_url_www.hackthesec.co.in.png" width="320" /></a></div>
<div align="LEFT" style="font-family: 'istok web', sans-serif; font-size: 18pt; margin-bottom: 0in; orphans: 1;">
<br />
</div>
</h1>
<h2 align="LEFT" class="western" style="background: #ffffff; margin-bottom: 0in; margin-top: 0in; orphans: 1;">
<code class="western"><span style="color: #0b5394;"><span style="font-family: istok web, sans-serif; font-size: x-large;"><u>Testing
for TRACE support with curl</u></span></span></code></h2>
<h1 style="background-color: white; border: none; margin: 0px;">
<div align="LEFT" style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; font-family: 'istok web', sans-serif; margin-bottom: 0in; orphans: 1;">

</div>
<pre style="background-attachment: initial; background-clip: initial; background-color: #363636; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; 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: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="font-family: Courier New, Courier, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;"><span style="color: white;">$ curl -i -X TRACE http://www.linuxtutorial.net/
HTTP/1.1 200 OK
Date: Wed, 13 Feb 2013 14:22:56 GMT
</span><span style="color: lime;">Server: Apache/2.2.15 (CentOS)
</span><span style="color: white;">Transfer-Encoding: chunked
Content-Type: message/http

TRACE / HTTP/1.1
</span><span style="color: lime;">User-Agent: curl/7.21.7 (x86_64-redhat-linux-gnu) libcurl/7.21.7 NSS/3.13.3.0 zlib/1.2.5 libidn/1.22 libssh2/1.2.7
</span><span style="color: white;">Host: www.linuxtutorial.net
Accept: */*</span></span></span></pre>
<div align="LEFT" style="font-weight: normal; margin-bottom: 0in; orphans: 1;">
<span style="color: black;"><span style="font-family: Georgia, Times New Roman, serif; font-size: large;">As
you can see, I am getting a response from the server for the TRACE
request. Now let us disable it.</span></span></div>
</h1>
<h2 align="LEFT" class="western" style="orphans: 1;">
<span style="color: #0b5394; font-size: x-large;"><u>Disabling TRACE support in Apache2</u></span></h2>
<h1 style="background-color: white; border: none; margin: 0px;">
<div align="LEFT" style="font-weight: normal; margin-bottom: 0in; orphans: 1;">
<span style="color: black;"><span style="font-family: Georgia, Times New Roman, serif; font-size: large;">To
switch off TRACE support, you need to open your main Apache2
configuration file which is here on my CentOS box:</span></span></div>
<pre class="western" style="background-attachment: initial; background-clip: initial; background-color: #363636; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 1px solid rgb(221, 221, 221); font-family: 'istok web', sans-serif; font-size: 18pt; line-height: 0.2in; margin-bottom: 0.16in; margin-top: 0.16in; orphans: 1; padding: 0.19in 0.21in;"><span style="font-family: "courier new", "courier", monospace;"><span style="font-size: medium;"><code class="western"><span style="color: white;">nano /etc/httpd/conf/</span><span style="color: lime;">httpd.conf</span></code></span></span></pre>
<div align="LEFT" style="font-family: 'istok web', sans-serif; font-weight: normal; margin-bottom: 0in; orphans: 1;">
<span style="color: black;"><span style="font-family: "georgia", "times new roman", serif;"><span style="font-size: large;">Now
add this directive to that file (I added it to the bottom of the
file):</span></span></span></div>
<pre style="background-attachment: initial; background-clip: initial; background-color: #363636; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; 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: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="font-family: Courier New, Courier, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;"><span style="color: lime;">TraceEnable </span><span style="color: white;">off</span></span></span></pre>
<div align="LEFT" style="font-family: 'istok web', sans-serif; font-weight: normal; margin-bottom: 0in; orphans: 1;">
<span style="color: black;"><span style="font-family: "georgia", "times new roman", serif;"><span style="font-size: large;">...and
restart Apache2:</span></span></span></div>
<pre style="background-attachment: initial; background-clip: initial; background-color: #363636; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; 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: 7px; border: 1px solid rgb(221, 221, 221); font-family: 'istok web', sans-serif; font-stretch: inherit; font-weight: normal; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><pre class="western" style="font-size: 18pt; font-weight: bold; line-height: 0.2in; orphans: 1;"><span style="font-family: "courier new", "courier", monospace;"><span style="font-size: medium;"><span style="color: white;">service </span><span style="color: lime;">httpd restart</span></span></span></pre>
</pre>
<div align="LEFT" style="font-family: 'istok web', sans-serif; font-weight: normal; margin-bottom: 0in; orphans: 1;">
<span style="color: black;"><span style="font-family: "georgia", "times new roman", serif;"><span style="font-size: large;">Now
when I run the same curl command again from my client machine, this
is the response I get:</span></span></span></div>
<pre class="western" style="background-attachment: initial; background-clip: initial; background-color: #363636; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 1px solid rgb(221, 221, 221); font-family: 'istok web', sans-serif; line-height: 0.2in; margin-bottom: 0.16in; margin-top: 0.16in; orphans: 1; padding: 0.19in 0.21in;"><span style="font-size: large;"><code class="western"><span style="color: white;"><span style="font-weight: normal;">$ curl -i -X TRACE http://www.linuxtutorial.net/</span></span></code>
<code class="western"><span style="color: white;"><span style="font-weight: normal;">HTTP/1.1 405 Method Not Allowed</span></span></code>
<code class="western"><span style="color: white;"><span style="font-weight: normal;">Date: Wed, 13 Feb 2013 14:30:32 GMT</span></span></code>
<span style="color: lime;"><code class="western"><span style="font-weight: normal;">Server: Apache/2.2.15 (CentOS)</span></code>
</span><code class="western"><span style="color: white;"><span style="font-weight: normal;">Allow: </span></span></code>
<code class="western"><span style="color: white;"><span style="font-weight: normal;">Content-Length: 223</span></span></code>
<code class="western"><span style="color: white;"><span style="font-weight: normal;">Content-Type: text/html; charset=iso-8859-1</span></span></code>

<span style="color: lime;"><code class="western"><span style="font-weight: normal;"><!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"></span></code>
</span><code class="western"><span style="color: white;"><span style="font-weight: normal;"><html><head></span></span></code>
<span style="color: lime;"><code class="western"><span style="font-weight: normal;"><title>405 Method Not Allowed</title></span></code>
</span><code class="western"><span style="color: white;"><span style="font-weight: normal;"></head><body></span></span></code>
<code class="western"><span style="color: white;"><span style="font-weight: normal;"><h1>Method Not Allowed</h1></span></span></code>
<code class="western"><span style="color: white;"><span style="font-weight: normal;"><p>The requested method TRACE is not allowed for the URL /.</p></span></span></code>
<span style="font-family: "courier new", "courier", monospace;"><code class="western"><span style="color: white;"><span style="font-weight: normal;"></body></html></span></span></code></span></span></pre>
<pre class="western" style="background-attachment: initial; background-clip: initial; background-color: #363636; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; background-size: initial; border-image-outset: initial; border-image-repeat: initial; border-image-slice: initial; border-image-source: initial; border-image-width: initial; border: 1px solid rgb(221, 221, 221); font-family: 'istok web', sans-serif; line-height: 0.2in; margin-bottom: 0.16in; margin-top: 0.16in; orphans: 1; padding: 0.19in 0.21in;"><span style="font-size: large;"><span style="font-family: "courier new", "courier", monospace;"><code class="western"><span style="color: white;"><span style="font-weight: normal;"><a href="http://www.hackthesec.co.in/" target="_blank">www.hackthesec.co.in</a>
@hackthesecurity</span></span></code></span></span></pre>
</h1>
</div>
</div>
</div>

Disabling the TRACE method in Apache2

Disabling the TRACE method in Apache2 By default, Apache2 supports the HTTP TRACE method, which could expose your server to certain C...

How to Install Dovecot to configure POP/IMAP server

<div dir="ltr" style="text-align: left;" trbidi="on">
<span style="color: red; font-size: large;"><b><i>Install Dovecot to configure POP/IMAP server. POP uses 110/TCP, IMAP uses 143/TCP.</i></b></span><br />
<span class="Apple-tab-span" style="white-space: pre;"> </span><br />
<h5 style="background-color: white; border: 0px; font-stretch: inherit; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<span style="color: #333333; font-family: PT Serif, serif;"><span style="font-size: 16px; font-weight: normal; line-height: 22.4px;">Dovecot is an open-source </span><span style="font-size: 16px; line-height: 22.4px;">IMAP </span><span style="font-size: 16px; font-weight: normal; line-height: 22.4px;">and </span><span style="font-size: 16px; line-height: 22.4px;">POP3 </span><span style="font-size: 16px; font-weight: normal; line-height: 22.4px;">server for </span><span style="font-size: 16px; line-height: 22.4px;"><a href="http://www.hackthesec.co.in/search/label/Linux" target="_blank">Linux</a>/<a href="http://www.hackthesec.co.in/search/label/Unix" target="_blank">UNIX</a></span><span style="font-size: 16px; font-weight: normal; line-height: 22.4px;">-like systems, written primarily with security in mind. </span><span style="font-size: 16px; line-height: 22.4px;">Timo Siraine</span><span style="font-size: 16px; font-weight: normal; line-height: 22.4px;">n originated Dovecot and first released it in July 2002. Dovecot developers primarily aim to produce a lightweight, fast and easy-to-set-up open-source mailserver.</span></span></h5>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRrg4TzbnV-V7NoYZwKq0ehyphenhyphenJH5JjaixDvrG5ICQ6SZ7vuld5lCT-rrw4u-k-OstFVN72kY5cev3r8widUmPGbqCsc2ScjRG1jr0DTVOpDgoTVKubdhramOUOO_uZ5rHQq1YBl8HGF7g6D/s1600/dovecot_mail_server_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="139" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjRrg4TzbnV-V7NoYZwKq0ehyphenhyphenJH5JjaixDvrG5ICQ6SZ7vuld5lCT-rrw4u-k-OstFVN72kY5cev3r8widUmPGbqCsc2ScjRG1jr0DTVOpDgoTVKubdhramOUOO_uZ5rHQq1YBl8HGF7g6D/s320/dovecot_mail_server_www.hackthesec.co.in.png" width="320" /></a></div>
<br />
<h5 style="background-color: white; border: 0px; font-stretch: inherit; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<span style="color: #333333; font-family: PT Serif, serif;"><span style="font-size: 16px; font-weight: normal; line-height: 22.4px;">According to Openemailsurvey Dovecot has an installed base of over 2.9 million email servers all over the world and a global market share of 57% of all IMAP servers. While Dovecot software can be used in commercial use without any license fees, a commercial version is also available as Dovecot Pro. The commercial version is provided by Dovecot Oy along with support and enterprise add-ons such as the object storage and full-text search plugins. Since March 2015, Dovecot Oy has been part of the Open-Xchange Family.</span></span></h5>
<br />
<ul style="text-align: left;">
<li><a href="http://www.hackthesec.co.in/2016/02/install-and-configure-postfix-to.html" target="_blank"><span style="font-size: large;">Install Postfix to configure SMTP server. SMTP uses 25/TCP</span></a></li>
</ul>
<br />
<span style="font-family: Georgia, Times New Roman, serif;"><br /></span>
<span style="color: #0b5394; font-family: Georgia, Times New Roman, serif; font-size: large;">1.Install Dovecot.</span><br />
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="color: lime; font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;">[root@mail ~]# yum -y install dovecot</span></span></pre>
<h5 style="background-color: white; border: 0px; font-stretch: inherit; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<span style="color: #333333; font-family: PT Serif, serif;"><span style="font-size: 16px; font-weight: normal; line-height: 22.4px;">Dovecot  Configuration</span></span></h5>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="color: lime; font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;">[root@mail ~]# vi /etc/dovecot/dovecot.conf
# line 24: uncomment
protocols = imap pop3 lmtp
# line 30: uncomment and change ( if not use IPv6 )
listen = *</span></span></pre>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="color: lime; font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;">
[root@mail ~]# vi /etc/dovecot/conf.d/10-auth.conf
# line 10: uncomment and change ( allow plain text auth )
disable_plaintext_auth = no
# line 100: add
auth_mechanisms = plain login</span></span></pre>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="color: lime; font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;">
[root@mail ~]# vi /etc/dovecot/conf.d/10-mail.conf
# line 30: uncomment and add
mail_location = maildir:~/Maildir</span></span></pre>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="color: lime; font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;">
[root@mail ~]# vi /etc/dovecot/conf.d/10-master.conf
# line 96-98: uncomment and add like follows
# Postfix smtp-auth
unix_listener /var/spool/postfix/private/auth {
    mode = 0666
    user = postfix 
    group = postfix 
}</span></span></pre>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="color: lime; font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;">
[root@mail ~]# vi /etc/dovecot/conf.d/10-ssl.conf
# line 8: change (not require SSL)
ssl = no</span></span></pre>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="color: lime; font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;">
[root@mail ~]# systemctl start dovecot 
[root@mail ~]# systemctl enable dovecot </span></span></pre>
<span style="color: #0b5394; font-family: Georgia, Times New Roman, serif;"><a href="http://www.hackthesec.co.in/" target="_blank">www.hackthesec.co.in</a><br /><a href="https://www.twitter.com/hackthesecurity" target="_blank">Hack The Sec Twitter</a></span><br />
<br /></div>

How to Install Dovecot to configure POP/IMAP server

Install Dovecot to configure POP/IMAP server. POP uses 110/TCP, IMAP uses 143/TCP. Dovecot is an open-source IMAP and POP3 server for L...

Install and Configure Postfix to configure SMTP server

<div dir="ltr" style="text-align: left;" trbidi="on">
<h5 style="background-color: white; border: 0px; font-stretch: inherit; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<span style="color: red; font-family: PT Serif, serif;"><span style="font-size: 20px; line-height: 26px;"><u><i>Install Postfix to configure SMTP server. SMTP uses 25/TCP</i></u></span></span></h5>
<h5 style="background-color: white; border: 0px; font-stretch: inherit; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<span style="color: #333333; font-family: PT Serif, serif;"><span style="font-size: 16px; font-weight: normal; line-height: 22.4px;">Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail, intended as an alternative to the widely used Sendmail MTA.</span></span></h5>
<h5 style="background-color: white; border: 0px; font-stretch: inherit; margin: 0px 0px 14px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi6erBvDea_BmtV8j6nHRCfkyP1HK7xWFm-jBQpRByg78AFExVdUV0TEm-_ECHCjSH1HpwNtZ-tuVkrFZaLhZYGHabCL5H-90tCexaLTrAat0bCFYNwzFN6SJI_CgC__uDysSUzEnaOdyGM/s1600/postfix-mail-server_www.hackthesec.co.in.png" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi6erBvDea_BmtV8j6nHRCfkyP1HK7xWFm-jBQpRByg78AFExVdUV0TEm-_ECHCjSH1HpwNtZ-tuVkrFZaLhZYGHabCL5H-90tCexaLTrAat0bCFYNwzFN6SJI_CgC__uDysSUzEnaOdyGM/s200/postfix-mail-server_www.hackthesec.co.in.png" width="200" /></a><span style="color: #333333; font-family: PT Serif, serif;"><ul style="text-align: left;">
<li><a href="http://www.hackthesec.co.in/2016/02/how-to-install-dovecot-to-configure.html" target="_blank">SMTP-Auth to use Dovecot's SASL function</a></li>
<li><a href="http://www.hackthesec.co.in/2016/02/how-to-install-dovecot-to-configure.html" target="_blank">How to Install Dovecot to configure POP/IMAP server</a></li>
</ul>
<span style="font-size: 16px; font-weight: normal; line-height: 22.4px;">Postfix is installed even if <a href="http://www.hackthesec.co.in/search/label/Centos" target="_blank">CentOS </a>system was installed with [Minimal Install], but if Postfix is not, Install it first like follows.</span></span></h5>
<div>
<span style="color: #333333; font-family: PT Serif, serif;"><span style="font-size: 16px; font-weight: normal; line-height: 22.4px;"><br /></span></span></div>
<div>
<span style="color: #333333; font-family: PT Serif, serif;"><span style="font-size: 16px; font-weight: normal; line-height: 22.4px;"><br /></span></span></div>
<div>
<span style="color: #333333; font-family: PT Serif, serif;"><span style="font-size: 16px; font-weight: normal; line-height: 22.4px;"><br /></span></span></div>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="color: lime; font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;">[root@mail ~]# yum -y install postfix</span></span></pre>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjtUFqbeQIjF1sMQ24NxFVepEZtUi97GyhdDw5rkJdnjhF2GdWUUl5ZA18_KoVGGvv_b4dN8X3dSOJGnIlPXERtkXRkSjXeiMlc17UuWMGn2CfqyNvQNVgHOiYxC1CJg5BA_ddr1QZ6Nr32/s1600/Postfix_architecture_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="292" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjtUFqbeQIjF1sMQ24NxFVepEZtUi97GyhdDw5rkJdnjhF2GdWUUl5ZA18_KoVGGvv_b4dN8X3dSOJGnIlPXERtkXRkSjXeiMlc17UuWMGn2CfqyNvQNVgHOiYxC1CJg5BA_ddr1QZ6Nr32/s640/Postfix_architecture_www.hackthesec.co.in.png" width="640" /></a></div>
<div style="background-color: white; border: 0px; color: #333333; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
Postfix Configuration.<br /></div>
<div style="background-color: white; border: 0px; font-stretch: inherit; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<pre style="background-attachment: initial; background-clip: initial; background-color: #363636; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; 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: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;"><span style="color: white;">[root@mail ~]# </span><span style="color: lime;">vi /etc/postfix/main.cf</span><span style="color: white;">

# line 75: uncomment and specify hostname
myhostname = mail.hackthesec.co.in

# line 83: uncomment and specify domain name
mydomain = </span></span></span><span style="color: white; font-family: Monaco, 'Courier New', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-size: medium; line-height: 19px; white-space: pre-wrap;">hackthesec.co.in</span><span style="color: white; font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;">
</span></span><span style="font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;"><span style="color: white;">
# line 99: uncomment
</span><span style="color: orange;">myorigin = $mydomain
</span><span style="color: white;">
# line 116: change
inet_interfaces = all

# line 164: add
</span><span style="color: orange;">mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
</span><span style="color: white;">
# line 264: uncomment and specify your local network
mynetworks = 127.0.0.0/8, 10.0.0.0/24

# line 419: uncomment (use Maildir)
home_mailbox = Maildir/

# line 574: add
</span><span style="color: orange;">smtpd_banner = $myhostname ESMTP
</span><span style="color: white;">
# add follows to the end
# limit an email size for 10M
message_size_limit = 10485760
# limit a mailbox for 1G
mailbox_size_limit = 1073741824

# for SMTP-Auth
</span><span style="color: orange;">smtpd_sasl_type = dovecot
</span><span style="color: white;">smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
</span><span style="color: orange;">smtpd_sasl_security_options = noanonymous
</span><span style="color: white;">smtpd_sasl_local_domain = $myhostname
</span><span style="color: orange;">smtpd_recipient_restrictions = permit_mynetworks,permit_auth_destination,permit_sasl_authenticated,reject</span></span></span></pre>
<pre style="background-attachment: initial; background-clip: initial; background-color: #363636; background-image: initial; background-origin: initial; background-position: initial; background-repeat: initial; 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: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline;"><span style="font-family: Monaco, Courier New, DejaVu Sans Mono, Bitstream Vera Sans Mono, monospace; font-size: medium;"><span style="line-height: 19px; white-space: pre-wrap;"><span style="color: white;">
[root@mail ~]# systemctl </span><span style="color: lime;">restart postfix</span><span style="color: white;"> 
[root@mail ~]# </span><span style="color: lime;">systemctl </span><span style="color: white;">enable postfix </span></span></span></pre>
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<br /><br /><a href="http://www.hackthesec.co.in/" target="_blank">www.hackthesec.co.in</a><br /><a href="https://www.twitter.com/hackthesecurity" target="_blank">Hack The Sec Twitter</a></div>
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Install and Configure Postfix to configure SMTP server

Install Postfix to configure SMTP server. SMTP uses 25/TCP Postfix is a free and open-source mail transfer agent (MTA) that routes and d...

How to Install & configure Zimbra Open Source Mail Server on CentOS & RHEL

<div dir="ltr" style="text-align: left;" trbidi="on">
<span style="color: red; font-size: x-large;"><b><u><i>Install & configure Zimbra Open Source Mail Server on CentOS & RHEL</i></u></b></span><br />
<div>
<span style="background-color: white; color: #222222; font-family: "open sans"; font-size: 17px; line-height: 31px;">Zimbra  is a Free Email Server and Calendar & collaboration solution, built for the both  public and private cloud . It is also considered an Exchange replacement. Zimbra provides a web GUI from where mailserver admin can manage zimbra server. Zimbra provides end users with a feature-rich browser-based experience that enables them to seamlessly and securely connect to their emails on any device or platform.</span></div>
<div>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
In this tutorial we will install & configure open source zimbra server on CentOS 6.X / RHEL 6.X. Before installating zimbra sever following prerequisite should be completed.</div>
<div style="background-color: white; box-sizing: border-box; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<span style="color: #0b5394;">1. Create MX record for your domain<br style="box-sizing: border-box;" />2. Create A record for your’s Hostname</span></div>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
In my case domain is “hackthesec.co.in” & Server’s Hostname is “zimbra.hackthesec.co.in”</div>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;">Step:1</strong> Install Necessary  Packages & update hosts file</div>
<pre style="background-color: #f1f1f1; border-radius: 0px; border: none; box-sizing: border-box; font-family: monospace, monospace; font-size: 17px; line-height: 31px; margin-top: 24px; overflow: auto; padding: 4px 10px;"><span style="color: #222222;"># # yum -y </span><span style="color: #783f04;">install nc wget nano make nc sudo sysstat</span><span style="color: #222222;"> libtool-ltdl glibc perl ntp</span></pre>
<div>
<br /></div>
<div style="background-color: white; box-sizing: border-box; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<span style="color: red;">Edit the file /etc/hosts</span></div>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<span style="box-sizing: border-box; color: navy;">x.x.x.x zimbra.hackthesec.co.in</span></div>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;">Step:2</strong> Stop Sendmail & postfix service if started & Disabled Selinux</div>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"></strong></div>
<pre style="background-color: #f1f1f1; border-radius: 0px; border: none; box-sizing: border-box; color: #222222; font-family: monospace, monospace; font-size: 17px; line-height: 31px; margin-top: 24px; overflow: auto; padding: 4px 10px;"># chkconfig sendmail off ; service sendmail stop ; chkconfig postfix off ; service  postfix stop ;</pre>
<div style="background-color: white; box-sizing: border-box; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<span style="color: #222222;">Disable selinux  in the file </span><span style="box-sizing: border-box;"><span style="color: red;">/etc/selinux/config</span></span><span style="color: #222222;"> change the selinux= line to </span><span style="box-sizing: border-box;"><span style="color: red;">SELINUX=disabled </span></span></div>
<div style="background-color: white; box-sizing: border-box; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<span style="color: #0b5394;"><strong style="box-sizing: border-box;">Step:3</strong> Download the Zimbra Server using below command</span></div>
<div style="background-color: white; box-sizing: border-box; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<span style="color: #0b5394;"><strong style="box-sizing: border-box;"></strong></span></div>
<pre style="background-color: #f1f1f1; border-radius: 0px; border: none; box-sizing: border-box; color: #222222; font-family: monospace, monospace; font-size: 17px; line-height: 31px; margin-top: 24px; overflow: auto; padding: 4px 10px;"># wget http://files2.zimbra.com/downloads/8.0.4_GA/zcs-8.0.4_GA_5737.RHEL6_64.20130524120036.tgz</pre>
<div style="background-color: white; box-sizing: border-box; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<span style="color: #0b5394;"><strong style="box-sizing: border-box;"><br /></strong></span></div>
<div style="background-color: white; box-sizing: border-box; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<span style="color: #0b5394;"><strong style="box-sizing: border-box;">Step:4 </strong>Now extract Zimbra tar file using below command</span></div>
<pre style="background-color: #f1f1f1; border-radius: 0px; border: none; box-sizing: border-box; font-family: monospace, monospace; font-size: 17px; line-height: 31px; margin-top: 24px; overflow: auto; padding: 4px 10px;"><span style="color: #222222;"># </span><span style="color: #783f04;">tar -zxpvf </span><span style="color: #222222;">zcs-8.0.4_GA_5737.RHEL6_64.20130524120036.tgz</span></pre>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;"><br /></strong></div>
<div style="background-color: white; box-sizing: border-box; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<span style="color: #0b5394;"><strong style="box-sizing: border-box;">Step:5 </strong>Now Change the directory & run below command to install zimbra</span></div>
<pre style="background-color: #f1f1f1; border-radius: 0px; border: none; box-sizing: border-box; font-family: monospace, monospace; font-size: 17px; line-height: 31px; margin-top: 24px; overflow: auto; padding: 4px 10px;"><span style="color: #222222;"># cd zcs-8.0.4_GA_5737.RHEL6_64.20130524120036 
# </span><span style="color: #20124d;">./install.sh  --platform-override</span></pre>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
We are using ‘<strong style="box-sizing: border-box;">–platform-override</strong>‘ option in above command because installation script is only for Redhat  Linux but we are installing on CentOS 6.X machine so to override the Platform condition we are using this option. When we execute the above command we will get below output and follow the instructions :</div>
<pre style="background-color: #f1f1f1; border-radius: 0px; border: none; box-sizing: border-box; color: #222222; font-family: monospace, monospace; font-size: 17px; line-height: 31px; margin-top: 24px; overflow: auto; padding: 4px 10px;">Operations logged to /tmp/install.log.2570
Checking for existing installation... 
zimbra-ldap...NOT FOUND 
zimbra-logger...NOT FOUND 
zimbra-mta...NOT FOUND 
zimbra-snmp...NOT FOUND 
zimbra-store...NOT FOUND 
zimbra-apache...NOT FOUND 
zimbra-spell...NOT FOUND 
zimbra-convertd...NOT FOUND 
zimbra-memcached...NOT FOUND 
zimbra-proxy...NOT FOUND 
zimbra-archiving...NOT FOUND 
zimbra-cluster...NOT FOUND 
zimbra-core...NOT FOUND

PLEASE READ THIS AGREEMENT CAREFULLY BEFORE USING THE SOFTWARE. ZIMBRA, INC..

License Terms for the Zimbra Collaboration Suite: 
http://www.zimbra.com/license/zimbra_public_eula_2.1.html
Do you agree with the terms of the software license agreement? [N] Y
Do you agree with the terms of the software license agreement? [N] Y
License Terms for the Zimbra Collaboration Suite: 
http://www.zimbra.com/license/zimbra_public_eula_2.1.html
Do you agree with the terms of the software license agreement? [N] Y
Do you agree with the terms of the software license agreement? [N] Y

Checking for prerequisites... 
FOUND: NPTL 
FOUND: nc-1.84-22 
FOUND: sudo-1.8.6p3-12 
FOUND: libidn-1.18-2 
FOUND: gmp-4.3.1-7 
FOUND: /usr/lib64/libstdc++.so.6
Checking for suggested prerequisites... 
FOUND: perl-5.10.1 
FOUND: sysstat 
FOUND: sqlite

Prerequisite check complete.
Checking for installable packages
Found zimbra-core
Found zimbra-ldap
Found zimbra-logger
Found zimbra-mta
Found zimbra-snmp
Found zimbra-store
Found zimbra-apache
Found zimbra-spell
Found zimbra-memcached
Found zimbra-proxy

Select the packages to install
Install zimbra-ldap [Y] Y
Install zimbra-logger [Y] Y
Install zimbra-mta [Y] Y
Install zimbra-snmp [Y] Y
Install zimbra-store [Y] Y
Install zimbra-apache [Y] Y
Install zimbra-spell [Y] Y
Install zimbra-memcached [N] Y
Install zimbra-proxy [N] Y
Checking required space for zimbra-core
Checking space for zimbra-store
Installing: 
zimbra-core 
zimbra-ldap 
zimbra-logger 
zimbra-mta 
zimbra-snmp 
zimbra-store 
zimbra-apache 
zimbra-spell 
zimbra-memcached 
zimbra-proxy

The system will be modified.  Continue? [N] Y
Removing /opt/zimbra
Removing zimbra crontab entry...done.
Cleaning up zimbra init scripts...done.
Cleaning up /etc/ld.so.conf...done.
Cleaning up /etc/security/limits.conf...done.
Finished removing Zimbra Collaboration Server.

Installing packages
zimbra-core......zimbra-core-8.0.4_GA_5737.RHEL6_64-20130524120036.x86_64.rpm...done 
zimbra-ldap......zimbra-ldap-8.0.4_GA_5737.RHEL6_64-20130524120036.x86_64.rpm...done
zimbra-logger......zimbra-logger-8.0.4_GA_5737.RHEL6_64-20130524120036.x86_64.rpm...done
zimbra-mta......zimbra-mta-8.0.4_GA_5737.RHEL6_64-20130524120036.x86_64.rpm...done
zimbra-snmp......zimbra-snmp-8.0.4_GA_5737.RHEL6_64-20130524120036.x86_64.rpm...done
zimbra-store......zimbra-store-8.0.4_GA_5737.RHEL6_64-20130524120036.x86_64.rpm...done
zimbra-apache......zimbra-apache-8.0.4_GA_5737.RHEL6_64-20130524120036.x86_64.rpm...done
zimbra-spell......zimbra-spell-8.0.4_GA_5737.RHEL6_64-20130524120036.x86_64.rpm...done
zimbra-memcached......zimbra-memcached-8.0.4_GA_5737.RHEL6_64-20130524120036.x86_64.rpm...done
zimbra-proxy......zimbra-proxy-8.0.4_GA_5737.RHEL6_64-20130524120036.x86_64.rpm...done
Operations logged to /tmp/zmsetup.12152013-081656.log
Installing LDAP configuration database...done.

Setting defaults...
DNS ERROR resolving MX for zimbra.hackthesec.co.in
It is suggested that the domain name have an MX record configured in DNS
Change domain name? [Yes] Yes
Create domain: [zimbra.hackthesec.co.in] hackthesec.co.in.com                                            
MX: zimbra.hackthesec.co.in (162.13.151.48) 
Interface: 162.13.151.48
Interface: 2a00:1a48:7807:102:c7d4:45f6:ff08:2209
Interface: 10.181.72.68
Interface: 127.0.0.1
Interface: ::1
done.</pre>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;">Step:6</strong> Next you will come to the Main Menu which will show your configuration. Select #3 then change the Admin Password under option #4 next hit r to go back.</div>
<pre style="background-color: #f1f1f1; border-radius: 0px; border: none; box-sizing: border-box; color: #222222; font-family: monospace, monospace; font-size: 17px; line-height: 31px; margin-top: 24px; overflow: auto; padding: 4px 10px;">*** CONFIGURATION COMPLETE - press 'a' to apply
Select from menu, or press 'a' to apply config (? - help) a
Save configuration data to a file? [Yes] Yes
Save config in file: [/opt/zimbra/config.10975] 
Saving config in /opt/zimbra/config.10975...done.
The system will be modified - continue? [No] Yes
Operations logged to /tmp/zmsetup.12152013-081656.log
Setting local config values...</pre>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
When Configuration complete – press return to exit. Now the zimbra installation is completed.</div>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<strong style="box-sizing: border-box;">Step:7 </strong>Access web administration console</div>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
Use the URL ‘<span style="box-sizing: border-box; color: navy;">https://<Server’s HostName>:7071′</span></div>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
In my case URL is “https://zimbra.hackthesec.co.in:7071”</div>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
Use the User Name as admin and Password that we have set while installation in the above steps.</div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1Z6KUHaYWeXQFyG6YvYFqoR8TxIHBXyznC-xYB21cPSbtkm__Vqpt3gI6xqm46NomSYAgE0wLCg79B7b_im0isFjOOqVbgYtSh_MIeg3s-uciNeHe4tfhQ5-rQyFdS_Zo0E0mBkF_XtUx/s1600/zimbra-admin-console_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/AVvXsEg1Z6KUHaYWeXQFyG6YvYFqoR8TxIHBXyznC-xYB21cPSbtkm__Vqpt3gI6xqm46NomSYAgE0wLCg79B7b_im0isFjOOqVbgYtSh_MIeg3s-uciNeHe4tfhQ5-rQyFdS_Zo0E0mBkF_XtUx/s1600/zimbra-admin-console_www.hackthesec.co.in.jpg" /></a></div>
<div style="background-color: white; box-sizing: border-box; color: #222222; font-family: 'Open Sans'; font-size: 17px; line-height: 31px; margin-bottom: 26px;">
<br />
<div style="box-sizing: border-box; font-family: 'Open Sans'; margin-bottom: 26px;">
<strong style="box-sizing: border-box;">Note</strong> : Use zmcontrol Command to  stop, start & to check Status of zimbra Server</div>
<pre style="background-color: #f1f1f1; border-radius: 0px; border: none; box-sizing: border-box; font-family: monospace, monospace; margin-top: 24px; overflow: auto; padding: 4px 10px;">[root@zimbra ~]# su - zimbra 
[zimbra@zimbra ~]$ zmcontrol status
[zimbra@zimbra ~]$ zmcontrol stop
[zimbra@zimbra ~]$ zmcontrol start</pre>
<a href="http://www.hackthesec.co.in/" target="_blank">www.hackthesec.co.in</a><br />
<a href="https://www.twitter.com/hackthesecurity" target="_blank">Hack The Sec Twitter</a></div>
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How to Install & configure Zimbra Open Source Mail Server on CentOS & RHEL

Install & configure Zimbra Open Source Mail Server on CentOS & RHEL Zimbra is a Free Email Server and Calendar & collaborati...

How to enable User and Group Disk Quota on CentOS 7 and RHEL 7

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<h1 class="post-title" style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-stretch: inherit; font-weight: 400; letter-spacing: -1px; line-height: 1.3em; margin: 0px 0px 10px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">
<u><i><span style="color: red; font-size: large;">User and Group Disk Quota on CentOS 7 & RHEL 7</span></i></u></h1>
<div>
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As a Linux system admin we generally face low disk space issues. By implementing the user and group disk quota on the file system we can resolve the space issue.</div>
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Quota restricts the users to use only allowed disk and inodes on the particular file system. In this post we will discuss how to enable user & group disk quota on /home File system on <a href="http://www.hackthesec.co.in/search/label/centos7" target="_blank">CentOS 7</a> & <a href="http://www.hackthesec.co.in/search/label/Rhel7" target="_blank">RHEL 7</a></div>
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Step:1 Add usrquota & grpquota option on /home in /etc/fstab file.</h5>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: Monaco, 'Courier New', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: large;"><span style="color: white;">[root@hackthesec ~]# vi /etc/</span><span style="color: lime;">fstab</span></span></pre>
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Save & exit the file.</div>
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In this example i have add user and group quota options on /home</div>
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Step:2 Remount  /home file system via  mount command</h5>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: Monaco, 'Courier New', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="color: lime; font-size: large;">[root@hackthesec ~]# mount -o remount /home</span></pre>
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Now recheck the /home file system whether Quota is enable or not.</div>
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/dev/mapper/centos-home on /home type ext4 (</span><span style="color: lime;">rw,relatime,seclabel,quota,usrquota,grpquota,data=ordered</span><span style="color: white;">)</span></span></pre>
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Step:3 Create Quota Database Files using quotacheck</h5>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="font-family: Courier New, Courier, monospace; font-size: large;"><span style="color: white;">[root@hackthesec home]# </span><span style="color: lime;">quotacheck </span><span style="color: white;">-cugv /home</span></span></pre>
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Whereas :</div>
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-c : create quota file and don’t use the existing file<br />-v : verbose ouput<br />-u : user disk quota<br />-g : group disk quota</div>
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Above Command will create aquota.user & aquota.group files under /home</div>
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Turn on quota on /home using below command :</div>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: Monaco, 'Courier New', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: large;"><span style="color: white;">[root@hackthesec ~]# </span><span style="color: lime;">quotaon </span><span style="color: white;">/home/</span></span></pre>
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Step:4 Assign user & group disk quota via edquota commands</h5>
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Syntax <span style="border: 0px; color: #333399; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"># edquota -u <User_Name></span></div>
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<span style="border: 0px; color: #333399; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;"># edquota -g <Group_Name></span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTYIRoxgLj0c-lzeqSt8C4U3tO_kVGm_XaTvE5As1RD_BNdjn29hdNV1UcWMc59ibJXJh_FWhyvB2dDzB_C2bhnLPSeRQHl_ot5Ms8mFd4nIognW4U345hSez-wIxL4vW-WshwZWtgYY2F/s1600/edquota_www.hackthesec.co.in.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="71" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhTYIRoxgLj0c-lzeqSt8C4U3tO_kVGm_XaTvE5As1RD_BNdjn29hdNV1UcWMc59ibJXJh_FWhyvB2dDzB_C2bhnLPSeRQHl_ot5Ms8mFd4nIognW4U345hSez-wIxL4vW-WshwZWtgYY2F/s640/edquota_www.hackthesec.co.in.png" width="640" /></a></div>
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<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: Monaco, 'Courier New', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: large;"><span style="color: white;">[root@hackthesec ~]# edquota -g </span><span style="color: lime;">sys_admin</span></span></pre>
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As shown above we have two kind of <span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">Disk quota limits</span> :</div>
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<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">soft</span> : It will warn the users if the soft limit of disk quota reached ( size is in KB), in above example for jack user soft limit is 5500 KB ( approx 5.5MB )</div>
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<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">hard</span> : It will not allow the users to create new files once the hard limit is reached. ( Size in KB ), in above example hard limit for jack user is 6000 KB ( approx 6 MB )</div>
<div style="background-color: white; border: 0px; font-family: 'PT Serif', serif; font-size: 16px; font-stretch: inherit; line-height: 22.4px; margin-bottom: 1em; padding: 0px; vertical-align: baseline;">
<span style="border: 0px; font-family: inherit; font-size: inherit; font-stretch: inherit; font-style: inherit; font-variant: inherit; font-weight: 600; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline;">Note</span> : We can also set the Quota on the basis of the inodes ( i.e numbers of files that the user can create on particular file system)</div>
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Let’s take an example , login as jack user and try to create a file of 8MB.</div>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: Monaco, 'Courier New', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="color: white;"><span style="font-size: large;">[root@hackthesec ~]# su - jack</span><span style="font-size: 12px;">
</span></span><span style="font-size: large;"><span style="color: lime;">[jack@hackthesec ~]$ dd if=/dev/zero of=bgfile bs=1M count=8</span><span style="color: white;">dm-2: warning, user block quota exceeded.
dm-2: write failed, user block limit reached.
</span><span style="color: lime;">dd: error writing ‘bgfile’: Disk quota exceeded
</span><span style="color: white;">6+0 records in
5+0 records out
</span><span style="color: lime;">6144000 bytes (6.1 MB) copied, 0.00711317 s, 864 MB/s</span></span></pre>
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As we see above soft & hard limit is exceeded for jack user. Now onwards user jack can’t create new files.</div>
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Step:5 Display Quota report for Users in human readable</h5>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: Monaco, 'Courier New', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: large;"><span style="color: white;">[root@hackthesec ~]# </span><span style="color: lime;">repquota </span><span style="color: white;">-as</span></span></pre>
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Step:6 Configure Grace Period for Soft Limit</h5>
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Grace period is the amount of time during which soft limit can can be exceeded, once the grace period reached then soft limit will become the hard limit.</div>
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Use the edquota command to set Grace period .</div>
<pre style="background: rgb(54, 54, 54); border-radius: 7px; border: 1px solid rgb(221, 221, 221); font-family: Monaco, 'Courier New', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; font-stretch: inherit; line-height: 19px; margin-bottom: 15px; margin-top: 15px; overflow-x: auto; overflow-y: hidden; padding: 18px 20px; vertical-align: baseline; white-space: pre-wrap;"><span style="font-size: large;"><span style="color: white;">[root@hackthesec ~]# </span><span style="color: lime;">edquota </span><span style="color: white;">-t</span></span></pre>
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