[NMLUG] Multi-Homed Linux and Routing

[timothyemerick at yahoo.com (Tim Emerick)]

I've posed this question before but without knowing the proper  terminologies.  I've since experimented and have become stuck.  I'm using Debian testing.
   
  I'm trying to create a proxy server to bridge between two lans.
   
  eth0 is on lan0 and where all of my traffic should be coming/going.  It autoconfigured DNS/gateway from the DHCP server on lan0.  It should be my only default gateway.
   
  I installed eth1 and hooked it to lan1.  Linux autoconfigured it with it's own DNS service/gateway from the lan1 DHCP server.  I installed tinyproxy and specified incoming from lan0 and outgoing to lan1.  Only traffic on eth1 should be from/to tinyproxy only.
   
  Existing services started really bogging down and I found that it was because linux was trying to decide which lan/route to use because now I had 2 default routes.  I want only one default route...lan0.
   
  What next?  What info do I need to provide to clarify my problem?
   
  For now, I've disabled eth1 so my existing services can run unhindered.
   
  Thanks!
   
  Tim
   
  I'm confused.

		
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