Hello, I have a kernel 2.4.19 machine running netfilter (1.2.7a) and performing NAT for my internal network. The machine has two internet connections, one ADSL and one via a cable provider. I select the provider by changing the default gateway at the netfilter machine. The strange thing I noticed: when I am using cable as the default gateway, my firewall ruleset shows the multicast query the provider's router is sending me on a regular base. But when I change the default gateway to direct all outgoing traffic via the ADSL link, there are no more log entries showing the multicast query over the cable modem. Although when I dump the packets on the cable interface, I do see the Multicast queries. The firewall ruleset stays the same. I compared the loaded version, only different in packet counters. I suspect one of the kernel parameters (/proc/sys/net/...) influences this behaviour. But I don't know which one. Or is this behaviour netfilter specific? Do the packets which netfilter doesn't see get further into my machine? Or are they dropped by the kernel? Thanks, Jan
