I have Bering installed in a basically default setup:

eth0 is the external (internet) interface
eth1 is the internal interface

I'd like to use snat so that computers on the network behind eth1 can
access the internet using eth0's ip address.  As I understand it, this
should be the default shoreline configuration for Bering.

Unfortunatly, when I try to access the internet using a machine on my
internal network (behind eth1 of the Bering machine)...it fails.  A little
tracing has showed that the packets actually do get through the bering
host, but are denied on the way back:

Outgoing request (this seems to work alright):
   internal host --> firewall --> internet server


Reply (this is dropped at the firewall):
   internet server --> firewall // DROP

The firewall never sends the packet back to the internal host.  Instead,
it DROPs the packet and logs it.

Could someone suggest where I should start looking to resolve this
problem?  I've used iptables many of times, but browsing through the
rulesets for shoreline can be a little daunting :-)  Perhaps this is a
problem that would be more easily solved by looking elsewhere...but I'm
not really sure where to start.

Thanks,
bryan



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