Jean Francois Ortolo wrote: > > 3) As each packet is presumed to match only one built-in chain, is it > true all the incoming/forthcoming packets via the external interface eth0, > will match the FORWARD rules, so will do the internal eth1 packets ? > > In this question, I assume there is no user-defined chain in my > script. > Damned fool Indeed, the outgoing eth0 packets, go through the POSTROUTING chain, but do these go through other chains too ? Same question for incoming eth0, and incoming/outgoing eth1 packets. Many thanks for your responses. Jean Francois Ortolo