I have a bunch of rules in iptables to calculate network traffic and these are working fine for most IPs on the network (, etc).

One however is not working, this is I have set this up exactly the same as all the other rules. The only difference I can see is that I have an entry in the route table with

Kernel IP routing table 
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface    *        U     0      0        0 eth1   UG    0      0        0 eth0     *        U     0      0        0 eth0 
default         UG    0      0        0 eth1
Could this be stopping the rules in iptables counting traffic for this ip?

Any help would be appreciated.