Iptables: Port forwarding

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How can I punch holes through iptables to allow for an external pcAnywhere machine (dialup) to connect to an internal (private network) one? On our old server, it was done using ipportfw, but that has long since been dropped off the back dock and a new server put into place, which now uses iptables. I need both tcp as well as udp ports 5631 and 5632 opened.


So, the path for data will be:

 [   remote   ]                        [ firewall ]      [ internal ]
 [ pcAnywhere ] <--> [ internet ] <--> [ iptables ] <--> [ private  ]
 [    user    ]                        [  server  ]      [ network  ]

--
W | I haven't lost my mind; it's backed up on tape somewhere.
 +--------------------------------------------------------------------
 Ashley M. Kirchner <mailto:ashley@xxxxxxxxxx>   .   303.442.6410 x130
 IT Director / SysAdmin / WebSmith             .     800.441.3873 x130
 Photo Craft Laboratories, Inc.            .     3550 Arapahoe Ave. #6
 http://www.pcraft.com ..... .  .    .       Boulder, CO 80303, U.S.A.




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