I'm running a RedHat 7.2 system with iptables installed. For the most part, I'm running a script real similar to found at http://www.linuxguruz.org/iptables/s...rewall_015.txt

The problem that I have is I'm trying to get pcAnywhere to come in from the outside. The funny thing is that it works on one machine but not on any other. I've run tcpdump on both nic cards and noticed that on the machines that don't work, it appears that both nic cards fire the same packets almost simultaneously (same packet id numbers, etc) and they are both the Syn packets. The one that works does the normal Syn-R packet sequence. The other anomaly that puzzles me is that machines that don't work have the sender -> recipient address identical while the one that works has the address flipped.

At this point, I'm totally lost and confused. If anyone has any suggestions or needs more information please let me know.

Thanks,
Shawn

Let me as a few questions, are the computers you want to get to behind the firewall? If so, you might hav to setup a NAT.