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[Openvpn-users] TUN/TAP for Windows NT 4


  • Subject: [Openvpn-users] TUN/TAP for Windows NT 4
  • From: "Gerardo Gonzalez" <gonzalez.gerardo@xxxxxxxxx>
  • Date: Wed, 1 Mar 2006 00:08:58 -0600

Hello,

I'm trying to determine if it is possible to create a TUN/TAP driver
for Windows NT 4 so openVPN can be run on that platform.

I know that the current TUN/TAP driver for win32 doesn't support NT 4;
however, in the documentation they imply that it can be done, although
stability would be sacrificed:

http://openvpn.net/INSTALL-win32.html
"To a certain extent, backwards compatibility with NT 4 has been
sacrificed in the interest of better usability and stability on
Win2K/XP."

In the same document it's stated that openVPN's TUN/TAP driver is
derived from CIPE.

Then I found the following post by James Yonan:
http://openvpn.net/archive/openvpn-users/2004-02/msg00042.html
----------------------------------------------------
> Does Open VPN run on NT 4 or only W2K/XP

Only W2K and up (that's because it needs NDIS 5 which isn't available on NT).

James
-----------------------------------------------------

So, here are a couple of questions:
1. Is there any missing feature on NDIS 4 that prevents the
construction of a TUN/TAP driver for NT 4?
2. Is it possible to use CIPE as a starting point for creating a
TUN/TAP driver for NT 4 that can be used with openVPN? What would need
to be done?

Any help will be greatly appreciated.

Thanks in advance,
Gerardo.


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