The firewall of my university now blocks all of my websites. I haven't asked why they've blocked them, but I can't see why my website, git directory or searx instance would be considered inappropriate.
Only ports 80 and 443 have been blocked, so either the secret minecraft server had nothing to do with the ban, or the IT staff are inept and don't know what they're doing. Either one or the other, because the server is still accessible.
Since port 22 haven't been blocked, I can still access my websites using SSH tunnels. But I can't share them with other students. Very sad.
I will never forgive the IT staff.