which ports does amsn use?

sterrenkijker · 09-13-2004, 10:52 AM

Hi everybody,

I'm the only linuxcomputer in a small homenetwork with an etech router. I have blocked several ports (to protect the windowscomputers :P) with the routers' ip/port-filters. Nearly everything works fine in the network so far, except for my amsn (msn on the windowsboxes still works). I probably blocked some port I shouldn't block. The ports I blocked are:

1 - 20
54 - 79
81 - 109
144 - 442
588 - 6665

for both tcp and udp. Please don't laugh, I'm a security newbie... But tips are welcome of course.

Which ports should I unblock? Msn doesn't make connection anymore, it just keeps trying...

Thanks,

Sterrenkijker

sh1ft · 09-13-2004, 11:49 AM

A simple netstat --inet ladp while running amsn gives me this:

Code:

ctive Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 xx.xx.xx.xx:32814    baym-cs38.msgr.hot:1863 ESTABLISHED

So, I would assume it uses port 1863.

sterrenkijker · 09-13-2004, 12:17 PM

well, that wasn't simple for me

, I didn't know about netstat, I'm a securitynewbie as I said... But unblocking port 1863 helped. Thanks a lot...