Exim Privilege Escalation in 4.69-23

The cPanel security team found an issue in Exim that can potentially allow a user on the system to potentially run commands as the root user. Luckily, cPanel has already released a patch which is available for immediate download via their Exim upgrade script. If your system is set to update cPanel automatically, you may…

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Using Custom RBL’s with Exim and cPanel

cPanel 11.28 introduces an way to easily implement your own RBLs for Exim to perform lookups against.  To get started, log into WHM > Exim Configuration Editor and click on the RBLs tab, then Manage custom RBLs. From here, enter in the information for your RBL as follows: The DNS list would be the hostname…

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Setting up a Red5 Flash Media Server

This post will explain a simple process for installing a Red5 Flash Media server in a VPS or Dedicated environment. Install Subversion and Java yum -y install java-1.7.0-openjdk java-1.7.0-openjdk-devel yum -y install subversion Install Ant (get the latest from http://ant.apache.org/bindownload.cgi) cd /opt wget http://apache.spinellicreations.com/ant/binaries/apache-ant-1.9.0-bin.zip unzip ant/binaries/apache-ant-1.9.0-bin.zip mv apache-ant-1.9.0 ant ln -s /opt/ant/bin/ant /usr/bin/ant Update bash…

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10 Tips for Improving Email Delivery

One of the most common problems that hosting providers face is the issue of user email not being delivered to other mail servers. Not only does it annoy the end user, but it’s extremely frustrating for the server administrator to deal with since there’s not always a clear indication of why email doesn’t get delivered…

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Nasty Kernel Exploit in the Wild

I love waking up in on a nice Saturday morning to find out that one of my servers was rooted. A two-year-old kernel issue in Redhat distributions has surfaced in the form of a nasty exploit byAc1db1tch3z. Basically, a 32-bit binary is compiled and loaded to the server, and when run by any users (even…

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Adding New Feature Groups for a cPanel Theme

You’ll probably often see hosts that have a ton of extra icons in their cPanel for various items. When you’re customizing cPanel, it’s useful to be able to be able to add icon groups for features that either need to be grouped together, or that don’t fit into other categories. cPanel 11 makes it very…

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Installing ClamAV on a cPanel Server

ClamAV is an popular open source anti-virus toolkit for *nix, and while many people don’t find much value in using antivirus software on Unix, it is very useful for email scanning. cPanel’s implementation allows end users to run scans on their home folders, public FTP folders, mail, and public_html. It’s really hard to install ClamAV…

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Overview of PHP Handlers

One user on the cPanel forums spent some time summarizing the four PHP handlers,currently available via EasyApache, into a neat little chart that makes it easy to do a quick comparison. With that user’s permission, I’m posting the chart here: Click on the image for the original-sized diagram. Thanks to Miraenda from errorcodex.com for providing…

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cPanel Conference 2010

I’m excited to announce that this year I will be speaking at the cPanel conference, so if you haven’t yet registered, make sure you do it soon! The conference will be held in cPanel’s hometown of Houston, TX at the Westin Oaks Hotel between Oct 4-6,2010. My topic specifically will be covering full server automation…

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