I have a linksys router that is letting traffic through just fine, but when I try to let that same traffic through to my linux box (fedora 10) it stalls. I've followed every iptable rule I can find to no avail. If I chkconfig iptables off -> reboot. Voila. But obviously I don't want to leave things like that.
Any ideas? Any "tools" to see exactly what ports are or are not open?