Ive been trying to get fix the firewalled/natted problem on bittorrent for a long time and I dont know how yet. I use fedora core 6 and Im not sure if I have to put something in my iptables file or what. I dont have a router so I think its my firewall that fedora uses. Can someone tell me how to quickly and easily fix this so I can use bittorrent or azureus with no nat/firewall problem. I think I just need to forward the port but dont know how to do this Im a new to linux Ive been trying so many things I searched google and everything is complicated just to do forward a port. thanks for any help.

Do you have just one computer, or is the Fedora 6 computer sharing its internet connection?

If you only have one computer, then you don't use NAT. You do need to open the port in the firewall that you need to use.

The "quick and easy" way to do it is using Fedora's GUI firewall config program.
system-config-securitylevel

yes just 1 computer. I think disabling the whole firewall is a bad idea but your right would be a quick and fast way but I prefer to just forward the port if thats really all I have to do. I also no the port number if that helps. Any way I can just forward the port to accept connections on the firewall?
Do you know how I can do this and do I do it on the iptables file?
thanks.

I didn't suggest disabling the firewall. I suggested opening the particular port you want to use. Otherwise it will be blocked for inbound connections. You use NAT if you want that port to be forwarded to a different computer on the LAN. In other words, the destination IP address is Translated to that of the other computer. Since you don't have another computer, you don't need to do that. If you did have a 2nd computer that you wanted to use for bittorrent, the port that bit torrent uses would need to be opened in the second computer's firewall as well.

your right sorry. Can you give me an example of what I should put in the customize section. I put 6888 in the other under customization section is this right?

I use SuSE, so mine might be different. If there is a selector for either tcp or udp, then just enter the port number. If not, you may need to enter 6888/TCP or 6888/UDP. I'm sure that you can find documentation on your system for the "system-config-securitylevel" program.

There may be one tcp port and another udp port you need to open. Check the README file or help for the torrent client.

Another thing to check is if access to the client is controlled by xinetd. Look in /etc/xinetd.d/ for a file with torrent in the name. I doubt if that is the case in this case (pun intended), but it is possible. Some software packages will install a file in /etc/xinetd.d/, and you may simply need to change the line that turns the service off. One example is samba swat, for configuring the samba server through a web interface (on localhost:901).

On second thought, some bittorrent clients (like ktorrent) have a web interface you can use. This feature may need to be enabled before you can use it. This would be more useful if you set up a media pc box and you normally access it remotely.

I powered up an old laptop that I have Fedora Core installed on.

In the system-config-security program, Click on the "Firewall Options" tab. Click on "Other Ports" and then enter the port number. There is a drop down box to select either TCP or UDP. Refer to documentation for the torrent program on what port number should be open and whether to use tcp or udp..

For some protocols, both tcp and udp are listed but only one is actually used. An example of this would be microsoft-ds. Only 445/TCP is used.

I did that and nothing changed. It still says probably firewall/natted. I put it for tcp and udp. Is there something Im missing here?
I also tried with the utorrent on wine and it says Error! Port 52657 does not appear to be open.

Are you using a router or a modem (jschiwal worded it a little incorrectly)? If a router, you'll need to forward the port on the router. If you're in a university dorm, you'll need to talk to the network admin about setting up the university's firewall for you.

no Im not using a router Im just using fedora core 6. Im starting to think its my firewall I have to configure?

This is a worthwhile read...http://firewall-jay.sourceforge.net/faq.php