need to understand BT connection protocols

jotenakis · Post by **jotenakis** » Thu Mar 07, 2013 1:16 am

Hello
Let say i chose Port 54128 in transmission-daemon.
I have deactivated PEX and DHT. I also have "port-forwarding-enabled": false", which is I guess the same as deactivated "NAT-PMP/UPnP" option within the GTK application.
Also I choose "utp-enabled": true, which is I guess the same as activated "µTP support" option within the GTK application.

Do I need to open both UDP & TCP 54128 incoming ports in my netfilter firewall or only TCP ?
If I drop UDP, I see a lot of connections rejected on incoming UDP 54128. But if I open it, I never see UDP connection on that port using netstat ???

Also, I am suprised to see transmission connections on ports other than the specified one, using netstat -taupen ?

Code: Select all

tcp        0      0 MY.IP:33676     87.88.249.130:51413     ESTABLISHED 109        591413      1065/transmission-d
tcp        0      0 MY.IP:41763     90.33.140.191:51413     ESTABLISHED 109        591709      1065/transmission-d
tcp        0      0 MY.IP:49913     92.137.158.203:12842    ESTABLISHED 109        592769      1065/transmission-d
tcp        0  10685 MY.IP:49471     90.31.115.202:46397     ESTABLISHED 109        585641      1065/transmission-d
tcp        0  33155 MY.IP:54128     82.228.104.30:40641     ESTABLISHED 109        577223      1065/transmission-d
tcp        0  25802 MY.IP:54128     65.94.76.32:49381       ESTABLISHED 109        592144      1065/transmission-d
tcp        0  47880 MY.IP:54128     174.89.187.110:53500    ESTABLISHED 109        592166      1065/transmission-d

at the time of this netstat snaphot I was only seeding, not downloading. I understand the 3 latest ones but not the 4 first ones...........;

I also have connections on TCP 9091 but this is clear for me as related to the web client (limited to my internal network).

In terms of outgoing ports, what kind do I need to open ? Only 80 for tracker localization ? Others ?

Thanks,