Today’s post is about how to solve common StrongSwan IPSec VPN problems. If you are a Linux user, you may noticed that when you install StrongSwan using APT or building from source, the VPN is not working correctly: the network is unreachable or the traffic is not being encapsulated. This is a common problem in latest Debian based distributions or other ones that use systemd as resolver.
Well, the solution is pretty simple actually. Come with me for learning how to solve this.