In the UNIX or Linux environment, it is possible to asynchronously execute tasks at any desired time of the day, a feature made possible by the cron clock daemon.  In the following text we will present some general information on how to use cron and its companion at, as well as some tips on avoiding [...]

A firewall prevents all network access to your server (with certain exceptions that you will specify).
You can configure a firewall on your VPS using the Webmin control panel.  The iptables command will actually implement the firewall rules.
Before you decide to set up a firewall, please consider…  1) Misconfiguring a firewall can prevent you [...]

Many VPS customers are surprised at the number of failed SSH login attempts to their servers. By just having a listening server on the Internet, you will get dozens or even hundreds of brute force login attempts each day. Most of these attempts come from automated scripts running on other compromised machines. If you are [...]

When you have a MySQL database and want to spread the data reads and writes across multiple servers, you can setup master-master replication. What this does is in almost-realtime copy all commands from each server to the other, each acting as both a Master and Slave server.
This is NOT a good system for backups, as [...]

Companies and ISPs often use caching in proxy servers to reduce the load on their networks. These proxy servers are often configured to proxy any port, with little regard to security. If nothing is blocking connections from the outside, it is possible to detect the vulnerable server by scanning [...]

This blog entry will explain how to encrypt a shell script on your linux or a Unix based system. Although there might be other ways to encrypt your
shell script I found this one the most easiest to use. We will encrypt the script using the shc utility. I have been using this utility since [...]

Rookit hunter is probably one of the most useful applications that you can have installed on your cPanel VPS server. Although rootkits can’t be removed in most cases simply because they are installed into system files, RKHunter will still notify you of any rootkits that may exist in your system so that you can take [...]