I've tried a few different RH kernels now with little to no success so here is the next example. Here is what I did on this trail run. Patched the kernel with pptp conntrack. Created a diff set. Applied the diff set to the RHEL 4 ES source SPEC file and built the new kernel. Preliminary tests showed the same problem as with RHEL 3 ES (no outbound or inbound with all for modules loaded). I also compiled iptables as well. When I loaded the modules onto the test box (with almost the exact same config) I was able to load all for modules and make an outbound connections from the firewall and receive connections but I could not establish outbound connections from behind the firewall. The compile box is a dell 4700 with HT enabled. It has a just the devel libs installed and no X. The test box is a dell 2400 without HT with just the devel libs installed and no x. I compiled the RPM files (kernel and iptabled) and then deployed it on both boxes with different results. I has similar results with Fedora Core 3. Any help would be greatly appreciated. Gary Smith