ONE Server just refuses to respond (and it just so happens to be my favorite server)

I’ll get to the point right away: Redd’s RP (IP: 69.197.188.181:27015), a favorite server of mine, suddenly stopped responding for me whenever I try and join it. This literally happened to me out of the blue, and all of my friends who also play on this server are having no problem connecting. Apparently, it is just me. I can connect to all of the other servers I know of, just not this one (it appears to me as though it is not even there). I am all out of ideas, and would like to know what ports I have to forward or what secret relic I have to steal out of a temple to get this to work.

Thanks in advance, if any desperately needs my system specs for this problem, I’ll post them.

Reset your router.

I have, multiple times.