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Date: Sun, 13 Aug 2006 10:21:25 -0400
From: Troy Settle <troy@psknet.com>
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Subject: VPN through NAT?
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X-List-Received-Date: Sun, 13 Aug 2006 14:21:30 -0000

Probably not the best list to ask this on, but it's the closest that I'm 
subscribed to...

I have several customers who use VPN (Windows PPTP) to connect to their 
Corporate networks.  The first was sitting behind NAT on a FreeBSD 
router.  The PPTP did not work.  I moved them out of NAT and onto a 
regular IP, and it worked fine.  I then swapped out the FreeBSD box with 
a Cisco 2620 and again tried the PPTP via NAT, but still it wouldn't work.

Another customer is behind a Cisco 804 and his PPTP also did not work 
when his network was behind NAT, so I have to assign a static subnet for 
him.

 From home, sitting behind NAT on my Netgear router, I can turn up PPTP 
connections all day long.  What gives with FreeBSD and Cisco's 
implementation of NAT that PPTP doesn't want to work?

Thanks,

-- 

--
  Troy Settle
  Pulaski Networks
  http://www.psknet.com
  866.477.5638