cPanel allows you to easily create custom Exim filters by simply dropping the rules in /usr/local/cpanel/etc/exim/sysfilter/options/ and running: /scripts/buildeximconf service exim restart Here are a couple useful examples of filters we’ve created for our customers: Prevent email delivery to certain domains: if (“$h_to:, $h_cc:” contains “@domain.com”) or (“$h_to:, $h_cc:” contains “@domain.com”) then fail text “Emails to…
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If you have more than a few cPanel servers in your network, it may be a good idea to set up your own mirror to serve the files necessary to run cPanel updates. Doing this could save time and bandwidth, as well as prevent problems caused by mirrors being overloaded every time a new version…
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Update! cPanel supports LetsEncrypt, but you just need to install the plugin for it to work. To do this, run: /scripts/install_lets_encrypt_autossl_provider Once installed, Let’s Encrypt will appear in WHM’s Manage AutoSSL interface (Home >> SSL/TLS >> Manage AutoSSL) where you can enable the provider. At the time of this writing, LetsEncrypt is in public beta…
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The cPanel update fails due to a problem installing RPMs, but is not specific about what the problem is: [20160203.180007] Testing if the newly downloaded RPMS can be installed without conflict [20160203.180007] Testing RPM transaction [20160203.180012] [20160203.180012] ***** FATAL: Test install failed: [20160203.180012] The Administrator will be notified to review this output when this script…
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When attempting to create a user or restore a backup you may see this error: This system already has a database owner named___ To fix this, edit the following files on the system and remove entries for the user in question: /var/cpanel/databases/users.db /etc/dbowners…
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If your server is using a NAT setup and for some reason isn’t properly showing the correct public IP that should be mapped to the private IP on your server, you can easily fix this by creating a script to tell cPanel what the public IP should be. For example, you can simple put the…
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Note: This is an update from our 2011 post. If you’ve taken a peek at your PCI scan results lately, you may have noticed that your scan provider is now requiring OpenSSH 6.6 or higher due to CVE-2014-2532 – a version that is not currently available in the CentOS 5 or 6 repositories. A Yum update isn’t going…
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UPDATE 6/18: Shortly after this was posted and one of the major hosting companies I’m affiliated with removed BetterLinux from their servers due to stability problems, BetterLinux announced that they are shutting down, effective July 1st. Customers ask us all the time whether they should use CloudLinux or BetterLinux on their servers, and what differences exist…
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With the Ruby developer community continuing to grow, we often get requests for Ruby support from providers wanting to be able to offer their customers the ability to run Rails applications. We do not recommend using the current Ruby on Rails feature provided by cPanel, as it relies on the CentOS-provided version of Ruby as well as…
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If you’re a hosting provider with cPanel servers that were set up prior to version 11.46, you may be hearing from customers using Outlook ever since MS15-055 was released by Microsoft on May 12. This most recent Outlook upgrade prevents the software from connecting to a POP or IMAP server that uses DH keys that are…
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