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Cannot establish a VPN connection

1. I have a win2k server with ISA on it
2. A win2k PDC with AD

I can successfully establish a VPN with the PDC internal to the network but when I try externally onto the ISA server it connects but does not authenticate (hangs on the verifying username and password).

The ISA server is registered as in the RAS and IAS Servers account on the AD users & computers.

Any help appreciated.
Paul

Emptyone

What kind of VPN are you using? PPTP?

If so have you enabled PPTP on the IP Packet Filters properties?

Tim Holman

Ensure TCP port 1723 and protocol 47 (GRE) are allowed through for PPTP to work:

http://www.isaserver.org/img/upl/vpnkitbeta2/outboundnat-t.htm

http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q303530&ID=KB;EN-US;Q303530

pauljrichards

ASKER

Sorry for the delay in responding... I think a may not have been clear enough.
The problem is inbound connections.

Emptyone

I understood that, but have you checked the PPTP on the IP Packet Filter?

pauljrichards

ASKER

sorry...
PPTP 47 call and receive both direction is allowed

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Emptyone

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pauljrichards

ASKER

That is Correct.

I can establish a VPN from within the internal network but externally (and internally via ISA external interface) it connects but hangs on the verifying username and password

pauljrichards

ASKER

All sorted now....

All I did was re-apply Win2k SP4 & ISA200 SP2
Thanks for you help anyway!

Kind Regards
Paul