routing traffic between two network cards through firewall

Posted by RubyFreak on Server Fault See other posts from Server Fault or by RubyFreak
Published on 2012-09-28T13:32:51Z Indexed on 2012/09/28 21:40 UTC
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Filed under:

linux

|

networking

|

routing

I'm trying to test a network device (firewall) using a Linux box, with two network cards, one interface connected to the WAN zone and another interface to LAN zone.

The configuration is similar with that

|ETH0| <-> | FW | <-> ETH1

So from both interfaces I'm able to ping the respective firewall interface. But i'm not able to fire something like:

 ping -I eth0 ip.from.eth1

and to get any answer. Is that possible or should the linux network namespace solution or user level tcp stacks (VMs are out of question)

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