Newbie needs VPN port help

[jkennedy]

The good news is that I think I have the RAS server set
up correctly becuase I can establish VPN connections
between clients and the server on our internal network and
I can dial in to the RAS Server from home. But when I try
to establish a connection from a client through DSL or
Cable I get errors: 689 and 721, both of which sound like
they are not getting through the router.

I had our ISP open ports 47 and 1723. Are their any other
ports that I need to have opened?

Thanks in advance for any help.

 

[Chetan Raghavendra [MSFT]]

Are you trying L2TP connection which requires 1701 port to be open also?

--
Thanks
Chetan
(e-mail address removed)

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

 

[Bill Grant]

For PPTP you do not need port 47. What is essential is IP protocol 47,
which is GRE (Generic Routing Encapsulation). The VPN data is carried by
packets with GRE headers, so blocking GRE kills a PPTP VPN connection. PPTP
itself only controls the setup and maintenance of the tunnel.