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A way of setting up a computer for routing *just* port 113?



My router, which is not a computer, but rather an unbranded little plastic box, will only allow ports to be "forwarded" to one IP on the LAN's Class C subnet. This causes a problem when trying to use ident, which uses port 113, as it means that only one computer in the house may use ident without resetting the router.

Would it be possible to setup, say, my desktop machine, or any other Debian machine, to be a router for *just* port 113? So I could forward port 113 on the WAN to that machine, and then that machine could automatically share port 113 with any machine on the home LAN? This would include the Windows boxes that form the unfortunate majority on the LAN. If so, what would be the requirements?

Please understand I'm no expert with networking *or* Debian, but I know enough to setup small LANs and am generally capable of following instructions :)

Many thanks in advance :D

Joe



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