Firewall - Masquerade of MS messenger

Hi,

I have Linux 7.1 running as a Firewall between a local LAN and Internet (Something very simple).

Actually the firewall is using IP-Masquerade with IPChains. Everithing works fine, but the video and audio of MS messenger clients.

I studied a bit of this, and I found that ip masquerade (ipchains in this case) doesn't route H.323 (the strange protocol of messenger).

I also founded solutions for this issue in 2.2.x linux kernels (donwloading and compiling a kernel module)

... But the problem is ... that Redhat 7.1 has 2.4.x kernel ... and that solution doesn't work for this !

... Maybe there's another way !! ... Any ideas ???? ... What about upgrading to RH 8 ???

Thanks a lot for your help !!

Guillermo.

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