> Hi all, > > I know that Masquerade makes the outgoing packet with the src "ip address" ofthe link it > is going out on. BUT is there a way to specify the actual interface it shouldgo out on. > > for example, if there is ppp0 and ppp1, I want to be able to send all ICMP packets through > say ppp0. > > Basically I want all ICMP packets to go through one interface, don't care which one... > > What kind of rules will I need? two thoughts come to mind: 1) using the MARK target to set marks and using iproute2 to route the traffic accordingly (you can't swing a dead cat on this mailing list or on google without hitting an example on how to do this) 2) using the ROUTE target. seems to be a less common answer--but the example used in the help file is your exact scenario: # To force all outgoing icmp packet to go through the eth1 interface # (final target) : iptables -A POSTROUTING -t mangle -p icmp -j ROUTE --oif eth1 -j
