Trouble setting up VPN Connection

[Guest]

I'm having trouble making a VPN connection to my office. I have a 2k SP4
server with 1 NIC setup as a VPN server, I think it is setup right. It's
connected to the internet from a SpeedStream 5100 DSL router that plugs into
a Linksys BEFSR41 router via a PPPoE connection then into my network
switches. At home I've got a Motorola SB5120 cable modem then plugged into a
Microsoft MN-500 wireless router/switch via a dynamic connection.

I can connect to a Remote Desktop session to the server fine. I'm using
no-IP DUC to make a hostname available to me. When I try to make a VPN
connection I get an error stating it could not establish a secure tunnel. Do
I have something setup wrong?? Do I need a seperate NIC in the server to
support the VPN?? When I was setting it up on the server it would not let me
choose the NIC beacuse it was the last available network connection and it
said a VPN server requires at least one connection be used as the private
network connection.

Any help or advice is greatly appreciated.

 

[Ryan Hanisco]

Most VPN protocols cannot tunnel through an PPPoE connection. Check which
protocol you have configured and look it up to see if it can be sent over a
PPPoE connection. I can't remember this off hand... but look at IPSEC and
L2TP as possibilities.