Topic: More than one VPN connection trough the sme server 7.5.1

[beek]

i have a network with windows 7, vista and xp systems behind a sme 7.5.1 server.
i can connect to with one computer with the isa server, but the other 2 computers will not connect to the isa server.
and if i remove the sme server than i vcan connect with all the systems to the isa server.
what do i wrong, please help

[mophilly]

This sounds like it may be related to issue 3984.
http://bugs.contribs.org/show_bug.cgi?id=3984

Visit the bugs tab, bugs.contribs.org, and search on "VPN" for more information.

[mmccarn]

I have never successfully established more than one PPTP VPN from a single NAT'd LAN to a single PPTP server.

From everything I have read, PPTP "uniquely" identifies VPNs based on the public IP address at each end -- so from any network using NAT you will get (at least, I have always gotten) strange behavior any time you have more than one LAN workstation connected to the same remote PPTP server.  The last time I researched this, either the second connection would fail, or the first connection would stop working when the second connection was established.

I saw a note from Charlie a while back saying that there are subtleties to PPTP that could allow multiple connections from one NAT'd office to a single Microsoft PPTP server -- but I've never seen it work.  Perhaps if you're using a Windows box as the network router, but I haven't seen it work with Netgear, Linksys, Cisco PIX, or Sonicwall routers, nor from a network using a SME server in router-gateway mode - connecting to a remote Windows server (directly or using PPTP "pass-thru") or a remote SME server.