Bittorrent Ports

Arkas · 04-14-2004, 01:04 PM

I am trying to install azureus, a java bittorrent client and during setup it asks to enter a TCP incoming listening port. The default option in the setup menu is 6881 but when i try to test the port i get "Testing port 6881...NAT Error"
Well i am new in Linux and haven't got a clue what i'm supposed to do! I think i need to open the port 6881 if it is behind a firewall but i don't know how. I am using Fedora Core 1 with the standard security and firewall setup.
Any help would be much appreciated.

ugge · 04-15-2004, 12:49 PM

Is this a directly connected computer or is it behind a router?

Arkas · 04-16-2004, 01:12 PM

Well i am using alcatel's speedtouch adsl modem (green). Don't know much about routers and stuff.

ugge · 04-16-2004, 04:48 PM

You can try to clear all firewall rules iptables -F
If this woirks then you will have to figure out which port to open.

cleff · 05-14-2004, 03:11 AM

Quote:

Originally posted by ugge
You can try to clear all firewall rules iptables -F
If this woirks then you will have to figure out which port to open.

So how do you open the port?

jspaar · 05-14-2004, 04:14 PM

I use a script like this:

Code:

sudo /sbin/iptables -A INPUT -p tcp -m tcp --destination-port 6881:6889 -j ACCEPT

It opens the range of tcp ports from 6881-6889, but you could leave out the :6889 part if you only want to open 6881.

Not to be confusing, but on Red Hat you might want to change INPUT above to RH-Firewall-1-INPUT if you have that chain (run

Code:

sudo /sbin/iptables --list

to see if you do).

Someone put this useful tutorial in the LinuxQuestions wiki: basic firewall configuration

zaphodiv · 05-14-2004, 04:24 PM

If your computers ip address is 192.168.x.x, 10.x.x.x or 172.16-32.x.x
then you are behind a connection sharing system.