Get Free Linux Server Security, Performance & Troubleshooting Tips

From the blog

Error 421: too many concurrent smtp connections

On high traffic email servers you may see this kind of errors, it’s very normal in some situations when your users use lot of email. It basically means that there are a lot of open SMTP connections (incoming and/or outgoing). The exact error message may be something like: 421 Too many concurrent SMTP connections from this IP address; please…

Read More »

How to increase /tmp partition size on cPanel

Yesterday we published a security tutorial called: Secure /tmp partition on cPanel. While that way to secure the /tmp partition is fine, the script used by cPanel (/scripts/securetmp) has a problem that often affects many system administrators and developers. The problem is simple: cPanel allocates a small space size for the /tmp operations, and lot of times you…

Read More »

Secure /tmp partition on cPanel using /scripts/securetmp

On Linux systems there are a few temporal directories used for storage, like /tmp, /var/tmp and /dev/shm. This directories are used to store temporary files from different services such as Apache, MySQL, etc. However, sometimes this directories are also used by crackers and script kiddies to store malicious/malware and virus executables. This malicious scripts can be an open…

Read More »

Install Fantastico on cPanel/WHM

Fantastico Deluxe or Fantastico F3 (the new name) is a great product from Netemberg. With a fast installation it allows you to have a great and simple way to install applications with just a few clicks, without touching a single line of code. On this tutorial we will show you how to install Fantastico Deluxe on cPanel/WHM servers….

Read More »

How to find Bind version using Dig

By default BIND DNS server always reveals the version number. While this is not a security hole by itself, it’s the first point that a potential attacker will try to find out, the version number of your software and from that point he will try to find exploits for that version. That’s why today you will learn two…

Read More »

Set default charset for one cPanel account

Sometimes the text in our website has been placed on pages using different charsets than the standart one (UTF-8, generally), this can lead into issues while loading special characters for Spanish, Portuguese and other languages different than english. For those times you may need to tweak out the Apache default charset. The default charset for Apache can be…

Read More »

Move accounts from /home to /home2 on cPanel

Sometimes the available disk space on the root or /home partition can be at the limit, and on those cases you will need to delete old content, old backups or move accounts/domains from /home to another partition with more available disk space. How can I move accounts from /home to /home2 or another partition? On WHM there is…

Read More »
Comodo Secure