I have a MacBook Pro from 2014 running macOS Mojave. I cannot SSH into a remote server, use git over SSH or use the Mac App Store while connected to my Wi-Fi at home. Some of my mail accounts seem to have a problem, others work.
There is no problem with other devices, there is no problem if I am connected over Ethernet, there is no problem if I am connected via a different Wi-Fi, there is no problem if I use my university VPN via Wi-Fi, and there is no problem if I am running Ubuntu via USB.
The problem seems to be a specific combination from Home Wi-Fi and my macOS. I don't really want to reinstall my OS, and I don't have a single clue what I can do or try.
for IPv4, and