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October 17, 2001 02:17 PM

Using NAT with L2TP over IPSec

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Bob Chronister

Windows IT Pro

InstantDoc ID #21919

I recently installed PPTP on my company's Windows 2000 Server machine so that other users and I can reach the server from home. However, I now have an open Windows logon. Anyone with an Internet connection and a computer running Win2K, Windows NT, Windows Me, or Windows 98 can log on to the server if they know its IP address and can deduce a username and correlating password.

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This article ownz. I am getting ready to take my last MCSE exam, and I personally I am getting sick of errors in these stupid microsoft books.

Nick5/19/2004 5:46:33 AM

I feel that this article has been greatly oversimplified. Just saying "It can work" seems almost like a disservice to the person whom you were replying to. There are two modes of IPsec (Transport mode and tunnel mode) and only one (Tunnel) will work with NAT without disabling security checks on the data. Here is a real resources for the user who wanted to make NAT and IPsec work or at least understand it.

http://www.cisco.com/warp/public/759/ipj_3-4/ipj_3-4_nat.html

Eric Larson 6/20/2002 11:31:51 AM

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