Direct Dial VPN Routing Issues

[durinp]

Hello,
Today I just started messing with VPN's. I was able to successfully
get a VPN working from my laptop to my server. Below is the ipconfig
output

PPP adapter VPN:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 172.16.1.52
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 172.16.1.52

You see how it is assigning me a default gateway? From what I think I
know so far, that gateway address lets me traverse the LAN from the
routing and remote access server. I can ping other addresses such as
172.16.1.253, 252, etc... I can see all IPs on the other side. So, no
problems there.

I need to setup a Demand Dial interface between one server in a remote
location to the server I already set VPN access on using PPTP. I set
them up and the two can authenticate with each other and the direct
dial connection becomes established, however packets are not being
routed across the LAN on either server. Below is the ipconfig output:


PPP adapter {948561E6-1C48-42E4-AECB-9A98950E6E60}:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 172.16.1.53
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . :

Do you see how it has no gateway? I'm very sure that's my problem, but
I have no idea how to fix it.

 

[Robert L [MS-MVP]]

posting the routing table here may help.

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
Hello,
Today I just started messing with VPN's. I was able to successfully
get a VPN working from my laptop to my server. Below is the ipconfig
output

PPP adapter VPN:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 172.16.1.52
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . : 172.16.1.52

You see how it is assigning me a default gateway? From what I think I
know so far, that gateway address lets me traverse the LAN from the
routing and remote access server. I can ping other addresses such as
172.16.1.253, 252, etc... I can see all IPs on the other side. So, no
problems there.

I need to setup a Demand Dial interface between one server in a remote
location to the server I already set VPN access on using PPTP. I set
them up and the two can authenticate with each other and the direct
dial connection becomes established, however packets are not being
routed across the LAN on either server. Below is the ipconfig output:


PPP adapter {948561E6-1C48-42E4-AECB-9A98950E6E60}:

Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 172.16.1.53
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . :

Do you see how it has no gateway? I'm very sure that's my problem, but
I have no idea how to fix it.