CentOS Stream, RockyLinux and Alma Linux

Recently CentOS8 reached its supported end-of-life for security updates. For a number of reasons there will effectively be no more stable releases of CentOS 8 or later. Instead developers are being encouraged to look at CentOS Stream as a future proof option for elX based platforms. This is quite similar to how Gentoo and more… Continue reading CentOS Stream, RockyLinux and Alma Linux

Setting up Domains Keys (DKIM) on Postfix

This is a quick and fairly painless way of setting up DKIM, on a postfix server. DomainKeys Identified Mail (DKIM) is a method for associating a domain name to an email message, thereby allowing a person, role, or organization to claim some responsibility for the message and helps verify that your mail is legitimate. This… Continue reading Setting up Domains Keys (DKIM) on Postfix

Setting up Monit + with tomcat

We get asked a lot by customers to install and setup monit. Its not an overly hard task, in fact its pretty darned easy. Monit is brilliant for monitoring and restarting services when they are down, it can alert you or just restart after 5 failed connects/attempts. It handles everything from disk space, to memory,… Continue reading Setting up Monit + with tomcat

Quick and easy iptables blocking and firewalling basics

A customer emailed in today had noticed somebody trying to hack or crash his VPS. He tracked it down to one particular IP address but didnt know how to block him. There are several things you can do to block him, the long term solution and better option is probably using a firewall like iptables.… Continue reading Quick and easy iptables blocking and firewalling basics