About 2 days ago my server stopped letting me connect through the dyn IP. The "normal" IP never worked anyway but at first the dyn IP worked so it was not a problem. Now the server starts up normally and seems to run ok on the website, but when I enter the dyn IP in-game just like before it just won't show that the server is online and gives the typical "Can't reach server" or "Communication error". I've been trying different things for 2 days now, but nothing has worked so far, also tried switching networks at my end so I know it's not about my connection or anything.
It's a Tekkit Classic server btw.