[CentOS] Re: Forwarding connections/packets across interfaces

Tue Apr 18 05:20:55 UTC 2006
Keith Morse <kgmorse at mpcu.com>

Alan Sparks wrote:
> Is there additional voodoo that needs to be set to allow traffic to
> cross from one interface to the other?
> Thanks in advance for any advice or pointers.  I hope I've made the
> problem clear enough...

At the point you think things should be working and they aren't, it's
time to fire up tcpdump  on both interfaces and see what the packets are
actually doing.

tcpdump -ni eth0 ip


tcpdump -ni eth1 ip

for example