SSH Port forwarding

[sadai]

Hi,

the App is working quite good, but only one of my three port forwards are working:

2222:ip:22 not working (no service behind that port, but local port Scanner can see it)

8080:ip:443 working

3389:ip:3389 not working (asking for NLA, but is already activated, it is xrdp on Linux btw.)

Is it possible that the iPad detects these services and blocks it to avoid running them locally?
Another thing is, the forwarding connection is sometimes timing out, whileI trying to connect to a
Local port (keep alive activated).

Thanks in advance,

Regards Maik