Greetings, my children's school is temporarily without a sysadmin and I am helping them with little tasks. The current one is adding a third ISP to their split-routing configuration. Their configuration is the one described in the "Linux Advanced Routing HOWTO", with one iptable that looks like this: [root@fire ~]# ip route show table 222 default proto static nexthop via 111.11.111.1 dev eth3.100 weight 6 onlink nexthop via 22.122.22.222 dev eth3.101 weight 2 onlink nexthop via 192.168.100.1 dev eth3.102 weight 1 onlink (IP addresses changed). The system works fine with the first two "nexthop", but when I add the third one, I don't see any packets being sent or received on eth3.102. Now, I have tested that route separately by routing packets to a certain destination through it with this command: # ip route add 99.99.99.111 via 192.168.100.1 and verifying with tcpdump that pings to that site go through eth3.102. So that parts works fine. How can I figure out what's wrong? The firewall script is huge and I don't understand most of it, but there seem to be no special rules for that path (except one ALLOW rule for ssh-ing to a PC that does forwarding and NAT). I am not familiar with debugging this stuff, beyond what I just did. Any suggestions? Thanks! Luigi