PPTPD VPN - connect internal but not external

From: Russ Brucks (russb_at_kfoc.net)
Date: 12/30/03 

Date: Tue, 30 Dec 2003 20:33:45 GMT

We can connect from WinXP internally to the VPN server, but not
externally. We have opened all ports on the firewall, but it still
won't connect.

Perhaps we've failed to open a port somewhere? What ports are necessary
  for WinXP connection?

Port 1723 tcp / udp for the pptp

anything else? The logs indicate the failure occurs during the MSCHAP
authentication. The server sends to the remote client several times
without a response then eventually hangs up. I can provide logs if
necessary. Perhaps there is another port I need open? Please help.
Thanks!!

Russ

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