FYI, I posted a message in a new thread about how I successfully drilled port 6346 through a pretty hairy firewall configuration (three levels of firewalls, including a tightly configured Linux ipfilter-based IP Masquerading firewall).

See How I SOLVED the ULTIMATE Firewall Hell

Cheers!

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I don't visit here often. If you want to post a message for me to read, please PM me also (sorry, but it's the only way I'll see your message in a timely manner).