I told you on discord already:
start -> cmd -> ping play.fonline-reloaded.net
check results, if nothing then
start -> cmd -> ping 91.121.18.168
check results, if it works then connect via IP (and check your DNS settings)
if it doesn't, check your firewall
if your firewall doesn't filter it out and you still can't connect to that IP, then go with a torch to your ISP.