When I try to access my site, I get an empty response (Chrome: 'ERR_EMPTY_RESPONSE', Safari: 'The server unexpectedly closed the connection').
This only happens on one specific machine in one specific wifi. If I change the machine and try within the same wifi, the website loads. If I change the wifi (e.g. mobile hotspot) but keep the machine, the website loads. If I connect over a VPN, it works. I'm guessing it's a DNS issue because it also loads if I enter the IP address correctly (which, by the way, I find out by pinging my website address - which works).
I tried flushing my DNS cache, the router's cache, the browser caches - doesn't work.
What else can I try? I'm stumped.
Edit: It's also notable that I also cannot ssh into the server (it's mine) by the same rules - on any other config it works, but using this specific wifi with this specific computer on the website name doesn't.