This seems a little bit odd but although Plesk tells me that Plesk Firewall is working fine it doesn't seem to work. Online port scanner / Nmap see things different, too.
I tried to open Port 9987 udp for incoming data for a Teamspeak server (after the Server software wasn't working correctly...
I have this problem, too. It seems to work and I get success status that my rules have been added (I can see my rule in the overview) and then I successfully activate it, but it isn't working when I scan.
I tried to open Port 9987 UDP incoming for Teamspeak, but it just won't work. It seems...