Opening an Additional Exim Port

When I was in technical support, I got at least a dozen or more calls a week about clients who couldn’t send email, but had no problem receiving. When incoming mail works fine but the client can’t connect to the SMTP server, 99.9999% of the time it’s being caused by the ISP blocking remote SMTP/port…

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cPanel Command Line DNS and Cluster Management

DNS clustering is part of setting up a server environment. cPanel has built-in support for DNS clustering to make it easy to deploy centralized nameservers, or have multiple nameservers receive DNS zone updates from one server. This article will help you understand setting up and managing a DNS cluster from command line. Setting up a…

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Changing Exim’s Sending IP

Anyone running a shared hosting server is probably now accustomed to dealing with constant complaints about blacklisting. It’s exim’s default setup on a cPanel server to use the shared IP of the server to send email, which means that all your clients on one server are sending out email on the same IP.  All it…

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Installing PostgreSQL

PostgreSQL is an open-source database server similar (but different) than MySQL. cPanel has a built-in installer for setting up PostgreSQL easily. Keep in mind that the actual version of PostgreSQL you get depends on your OS version. For instance, CentOS 4 users will likely get version 7, CentOS 5 will get version 8. First, run…

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How to Change Your FTP Port

Lately FTP has been a problem for a lot of hosting providers. Especially since the recent influx of Gumblar-related attacks and FTP exploits, some hosting providers are now considering changing their FTP ports as an added measure of security. If you're on a cPanel server you have a couple extra steps to go through, but…

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Reinstalling Webmail

I've experienced from time to time a problem with webmail functioning after cPanel updates, particularly on larger servers. You can reinstall all three webmail applications, while not disrupting user content, with the following commands: Roundcube: /usr/local/cp The WordPress Classroom anel/bin/update-roundcube –force Horde: /usr/local/cpanel/bin/update-horde –force or /scripts/fullhordereset Squirrelmail /usr/local/cpanel/bin/update-squirrelmail –force zp8497586rq…

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cPanel: Installing Mod_Python on Apache 2

Note: It is preferred to use mod_wsgi instead of mod_python. If you want to use mod_python in Apache on a cPanel server, you’ll basically need to compile the module manually and load it into the Apache configuration: yum -y install subversion (IF it’s not already installed) svn co https://svn.apache.org/repos/asf/quetzalcoatl/mod_python/trunk mod_python cd mod_python ./configure –with-apxs=/usr/local/apache/bin/apxs make…

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Installing DomainKeys and SPF Records

DomainKeys (DKIM) and SPF records are becoming a common, and annoying, demand among email providers, mainly Yahoo and Hotmail. In short, both are methods of email authentication designed to verify email integrity, by linking a sender to a specific server or hostname. In other words, DomainKeys and SPF records specify what servers can send email…

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Installing Perl Modules

CPanel has a internal script for using CPAN to install Perl modules. Learn it and love it: /scripts/perlinstaller Most common Perl modules can be installed from WHM ~> Install a Perl Module, or from command line. If you don't know the name of the Perl module you're installing, you may want to use the WHM…

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