Windows 2000 Server 1 NIC VPN

[Guest]

Greetings;
I set up RRAS on my Windows 2000 server and set up permissions for 2 users
in AD. I was able to log on from home with my W XP Pro PC once, but have
been unsuccessful since. I restarted the RRAS. No luck. When I do a
netstat -an while I am attempting to connect from within the office, I see
port 1723 on the server ESTABLISHED as I attempt to connect, but then fails
to authenticate at the workstation.

I use a dynamic dns service (no-ip), have a DSL modem connecting to a DSL
router using NAT for 20 pc's with proper ports open on the router. There is
one NIC in my server, which is the only server the company has.

TNX for any help.

 

[Robert L [MVP - Networking]]

Assuming you receive error 721 or 800. it could be the GRE issue. These search results may help,

Event ID 20209 VPN Error 721, 800 or 806. Symptom: When try to establish a VPN, the VPN client ... Whenever he tries to establish the VPN, he receives Error 721 or 800. ...
www.chicagotech.net/troubleshooting/eventid20209.htm


RRAS/VPN Q&A Collections Cannot establish the VPN through Netgear RO318 · Cannot establish VPN with error 721 and 800 · Connect 2 PC's on different subnets via a Win 2003 RRAS ...
www.chicagotech.net/Q&A/vpnq&a.htm



Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
Greetings;
I set up RRAS on my Windows 2000 server and set up permissions for 2 users
in AD. I was able to log on from home with my W XP Pro PC once, but have
been unsuccessful since. I restarted the RRAS. No luck. When I do a
netstat -an while I am attempting to connect from within the office, I see
port 1723 on the server ESTABLISHED as I attempt to connect, but then fails
to authenticate at the workstation.

I use a dynamic dns service (no-ip), have a DSL modem connecting to a DSL
router using NAT for 20 pc's with proper ports open on the router. There is
one NIC in my server, which is the only server the company has.

TNX for any help.

 

[Guest]

Robert L;

Thanks for the URL. I do get the error 721 first (The remote computer did
not respond."). I just tried from inside my network to no avail. I looked
at my router's "Virtual Server" settings and I have port 47 open for TCP and
UDP. I tried it for TCP only and it failed with the same error message.

Is there a setting on the server I should check?

TNX

 

[Robert L [MVP - Networking]]

GRE is IP protocol not TCP. Just make sure the router is PPTP pass through.

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
Robert L;

Thanks for the URL. I do get the error 721 first (The remote computer did
not respond."). I just tried from inside my network to no avail. I looked
at my router's "Virtual Server" settings and I have port 47 open for TCP and
UDP. I tried it for TCP only and it failed with the same error message.

Is there a setting on the server I should check?

TNX

 

[Guest]

Thanks Robert.

My router is a little older and does not have the PPTP pass thru boxes like
newer ones.

 

[Daniel Styhler]

Good morning Doug,
what does the Homepage say about the Router, is it able to handle VPN?
You need to open Ports UDP 500 and TCP 1723 for a PPTP Connection.