[lug] Linux Router swallowing UDP

[Chip Atkinson]

What does ipchains -L show?  To my knowledge, that's the only thing that 
would be protocol specific.  How are you sending udp packets across the 
router box?


Andy Jolley wrote:

> I'm trying to setup a testlab environment at work to simulate an environment separated by a Nokia IP440 router (it runs IPSO OS which is a slimmed down BSD I think...).  Since those guys are so incredibly expensive, I'm trying to do the same thing with a Linux box.  I have IP and ICMP routing with absolutely no issues, but my UDP packets are not passing through the box.  I do a tcpdump and see them hitting eth0, but not coming out eth1, or back out eth0 for that matter.  My traceroutes show me the hops I expect around our network.
> I'm using the stock Red Hat 7.0 CD's (it's required for the versions of Linux compatible software I'm loading, so 7.1 isn't an option).  Is there a mod I'm missing for routing UDP?
> One of the steps I took, was to try the install everything option on setup, figuring I could slim it down after I got it working, after all it is a test environment.
> I need for our development department to be able to log into WinNT/2k through this router.  Also I have some other hardware, specifically RadWare's WSD Pros, in the test environment that are managed via SMNP, so getting UDP to route through this box is pretty important.
> Any ideas out there?
> 
> Thanks
> Andy Jolley
> LAN/WAN Administrator
> First Trust Corporation
> jolley at firsttrust.com
> 
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