Hi all, I'm having a problem with my new gateway set-up and I'm not sure where to start with the troubleshooting. I set up a gateway with two NICs in bridge mode to allow for my public IP addresses to pass straight through and then set up two virtual addresses on the bridge interface to NAT the remainder of the machines on my network, but still keep then in differing collision domains. The problem that I see is that Internet connectivity is sporadic at best. The connection will stay up for a minute or so, then go down for 5-60 seconds and then come back up. The odd thing is that machines with public addresses never see this problem, only the ones behind the NAT. I am running Debian Etch with kernel Linux debian 2.6.16-2-686 #1 Fri Aug 18 19:01:49 UTC 2006 i686 GNU/Linux I've also tried the 2.6.17-2-686 kernel with the same results. My iptables script is pretty bare: #! /bin/bash modprobe ip_conntrack_ftp iptables_nat iptables_mangle ip_nat_ftp echo "1" > /proc/sys/net/ipv4/ip_forward iptables -t nat -F iptables --out-interface br0 -t nat -A POSTROUTING -s 192.168.1.0/22 -j SNAT --to EXTERNALIP I had two iptables rules before, one for each subnet, but combined them into one rule to see if that would help, but no luck. Can anyone point me to how to get debug information from iptables or what I might try to remedy this problem? Thank you, Robert LeBlanc
