Category: Security

How To Enable TLS Encryption On Postfix

In this guide, I will show you a quick and easy way to enable TLS encryption on your Postfix server. The reason why you would want to enable this is that some email servers automatically mark incoming emails as spam if they are not encrypted with TLS as well as this helps prevent people from intercepting email traffic from your …

Display Password Change Requirements To Users

In this guide I will show you how to display the password requirements you have setup for your system to users when they are changing their password. The reason this is necessary is because usually they will not have any idea what the password requirements actually are. What we are going to do is add an extra function and alias …

How To Run Basic Shell Commands From PHP

Today I will be showing you how to run basic shell commands from a PHP script. While you can’t interact with these commands (for example top will not output or update, you can still use them to somewhat interact with your web server. Note that most shared web hosting providers block these functions in their php.ini settings for security reasons. …

Install And Use Rootkit Hunter On Linux Server

In this post I will show you how to install and run Rootkit Hunter on your Linux based servers. Rootkit Hunter does what it’s name suggests, hunts for potential rootkits on your server. If you are infected you can try to clean it but you really may want to nuke the server and start from scratch or revert to a …

Remove OS Information From Postfix Banner

In this post I will be showing you how to remove your server’s OS information from the postfix banner. While this isn’t enough to stop somebody from finding out your server OS by itself, it never hurts to make things just a tiny bit more difficult.

Install Clam-AV And Setup Daily Automated Scans

In this post I will be showing you how to setup Clam-AV on an Ubuntu server as-well as how to run automated daily scans with email alerting. This may sound like it’s complicated but its really not, you can have everything setup within 5 minutes so no need to fear!