I got a new VPS on the same machine on which I already have a VPS. But up-/download is much slower on the new VPS. Is there a possibility to check if there are clients trying to connect to a closed port and block the bandwith with these requests? For example if the previous owner of the IP address used the IP to control a botnet or whatever and those bots are connecting to my new VPS on some port? (had that on my old VPS on port 80 but they gave me a new IP :) ).
Already checked port 80 but there are no illegal connections coming in.