[Shorewall-users] Routing or Masq between multiple internal networks

gilsonsoares@gilsonsoares.com gilsonsoares@gilsonsoares.com
Thu, 11 Apr 2002 18:52:36 -0700 (PDT)

I have a quad ethernet in a RH72 system.
eth0 is the net
eth1,2,3 are internal networks

I was trying to connect pop3 from eth1 to eth3.

Even with policies and rules permitting free traffic
between then I wasn't able to connect.

To solve I JUST insert in MASQ file a line: "eth1 eth3".

Why I need to insert a masq from eth1 to eth3 to be
able communicate from one to another ?

Why net.ipv4.ip_forward=1, routing table, policies and
rules weren't enough to permit the traffic ?