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Can't see Linux Server Across VPN

Posted on 2005-02-28
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Last Modified: 2010-04-12
Hi,

We have a VPN between two Linksys RV42's that works ok mostly ;)  

Home: 192.168.2.x -- Linksys -- Comcast -- Verio -- Linksys -- Office: 192.168.111.x

From home or office, I have had no problems with Windows networking between machines across the VPN.

However, from home, I can't see our Linux server at the office at all!  

The office Linux box has dual port NIC with one port configured with a public interface and the other port configured for our private 192.168.111.x interface.   We have no problem accessing the server from the office via the .111 private interface, but the same box will not respond to anything from the home .2 network, even though all the Windows machines have no problem with this.

Here is what we see in log when we ping the server from the home network:

Feb 28 17:36:02 asterisk kernel: martian source 192.168.111.3 from 192.168.2.9, on dev eth1
Feb 28 17:36:02 asterisk kernel: ll header: 00:09:6b:1a:03:6d:00:12:17:4c:53:a4:08:00
Feb 28 17:36:07 asterisk kernel: martian source 192.168.111.3 from 192.168.2.9, on dev eth1
Feb 28 17:36:07 asterisk kernel: ll header: 00:09:6b:1a:03:6d:00:12:17:4c:53:a4:08:00
Feb 28 17:36:12 asterisk kernel: martian source 192.168.111.3 from 192.168.2.9, on dev eth1

help?

-Donald Newlands
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Question by:donaldnewlands
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lrmoore earned 500 total points
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> all the Windows machines have no problem with this.
That's because all the windows machines only have one NIC.
You need to add a route on the linux box. It is sending packets to 192.168.2.x out its default gateway (public nic) instead of back to the RV042 inside interface.
add a router statement (you verson of linux will vary on how exaclty to do it)
route add 192.168.2.0 255.255.255.0 192.168.111.1 <= assuming 111.1 = RV042
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Thanks!
<8-}
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