Re: SBS VPN Error: 781

From: Chris Puckett [MSFT] (cpuckett_at_online.microsoft.com)
Date: 11/30/04 

Date: Tue, 30 Nov 2004 00:32:45 GMT

Think of the term VPN as a generic term.

There are 2 underlying protocols that can be used to create a VPN. Those 2
protocols are PPTP and L2TP.
You can use one or the other to create a VPN connection. In either case,
the client and the server must be using the same protocol in order for the
VPN to be established. The VPN protocol you are using to create your VPN
connection determines the ports you must open/forward to the server.

PPTP uses TCP port 1723 and the GRE protocol.

L2TP uses UDP port 500 and UDP port 1701.

Chris Puckett, MCSE
Microsoft Small Business Server Support

This posting is provided "AS IS" with no warranties, and confers no rights.
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