I'm very confused right now. I have a server, Sahand, that I can connect from on campus too without issue. There's another server, Dena, that shares the same switch, etc.. also can connect to it.
From home though (off campus), I cannot connect to Sahand, but I can to Dena. The server admin assures me that there are no special rules being applied to Sahand. This behaviour is new.
Even when I disable the firewall on Sahand, there is no difference. Last week I was able to connect to it from home, nothing has changed since.
The ufw log (when it's enableD) doesn't indicate that it's blocking.
The traceroutes to both Sahand and Dena are similar.. Not too informative though as my campus blocks ICMP packets.. But when I do a traceroute with TCP packets to some ports, with Dena I can all the way there, with Sahand it can never get there (just enters the campus..)
I'm not sure where to diagnose this issue, as far as I've set it up, both Sahand and Dena should be identical.