docker Mailcow with Bahnhof Some random notes on how to setup your own email server using Bahnhof as an ISP (might be applicable to others as well)
Linux VM bridge networking with debian How to not spend hours making virtual machines having bridged network, allowing them to be reachable from other machines on the network.
Network pfSense on XCP-ng/Xenserver Tips and trix getting pfSense running better on virtualization (XCP-ng/Xenserver)
pfSense Site to site VPN using OpenVPN and pfSense After a lot of trial and error on and off I finally managed to get one of my Asus router to connect to my openVPN implementation in pfSense and having traffic flow both directions!