Open ports that shouldnt be open - HELP

[skiffx]

I ran nmap from several different machines and generally the results are:
Not shown: 65528 closed ports
PORT STATE SERVICE
21/tcp open ftp
80/tcp filtered http
135/tcp filtered msrpc
3389/tcp filtered ms-term-serv
30025/tcp open unknown
50558/tcp filtered unknown
55555/tcp open unknown

My setup is Airport Extreme > MBPro + 3 Windows Machines

I only have 3389 (windows rdc) 50558 and 55555 forwarded with in Airport Extreme router, everything else should be closed.

So why do I have 21, 135 and 30025 opened? any ideas?

 

[dampfdruck]

lsof

Use the "lsof" command.

E.g. lsof -i :1234
will show you details regarding port 1234

 

[skiffx]

Does anybody know if Airport Extreme keeps any ports opened by default?