Lucif3r20

I am trying to join a server for the first time after not playing for a year and my pc acts as if the server does not even exist, I've tried just about everything and nothing seems to work, I've tried validating my files, I've tried taking out my mods and putting them back, I've restarted my pc and nothing seems to work. I entered the server in on steam without even launching the game, and it says it's not responded when other people are in it, I'm the only one, it's not working for