[PLUG] port forwarding question

[David Calkins <dcalk@bellatlantic.net>]

I'm running a PC with RedHat Linux 7.2 (kernel v2.4.7-10) and using this 
machine to provide DSL internet access to my small LAN.  I've installed the 
"Roaring Penguin" DSL client v3.3.1, which set things up nicely and took 
care of configuring the settings necessary to have masquerading 
work.  Currently I'm able to surf the web, check Email, etc. from any 
machine on my LAN and its working great for this.

I'd like to run a network client on one of the machines in my LAN, which 
receives updates via UDP from a server on the internet.  So, I'd like to 
have the linux machine forward all UDP traffic on a particular port over to 
my LAN machine.

The IP-Masquerade-HOWTO (9/12/2001), sec 6.8 provides some info on how to 
do this.  I downloaded and installed ipmasqadm v0.4.2-4.  When I try to use 
it, I get a setsocketopt() error, which, according to the HOWTO, indicates 
my kernel doesn't have support for port forwarding.

I attempted to rebuild the kernel with support for port forwarding, 
however, I was unable to find any 'port forwarding' option in the kernel 
configuration (using 'make menuconfig').

Any ideas? :-)





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