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Cannot Create Demand Dial VPN Between Two Networks

 
 
joao@braviawebdesign.com
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      11-26-2005, 11:51 PM
Here is the network layout I am trying to achieve:

Network A Network B
[public ip, 192.168.0.1]---[(cable router)]
| |
| [public ip, 192.168.2.1]
| |
| |
[192.168.0.21]-| [192.168.2.2, 192.168.6.1 (linksys router)]
| |
[192.168.0.22]-| |-[192.168.6.10]
|
[192.168.0.xx]-|

Both 192.168.0.1 and 192.168.2.1 are windows 2003 boxes wih RRAS
installed.

I cannot create a demand dial VPN connection between 192.168.0.1 and
192.168.2.1 using their public ips. I can however create a vpn between
192.168.0.21 and 192.168.2.1 using 192.168.2.1's public ip. Same thing
when going the other way, I can create a vpn to 192.168.0.1 from any
box behind 192.168.2.1 but not that box itself.

I'm sure this problem is related: When i try to remote desktop to
192.168.2.1 (on either 192.168.2.1 OR it's public IP) from any box
behind the linksys router i get the following error: The connection was
ended because of a network error. But I can remote desktop from any box
in 192.168.0.x.

This is very strange because when I run a tracert from 192.168.6.x to
192.168.2.1 I get the correct response.

I have been trying to link these two networks together for a long time
now with no success. Any help would be greatly appreciated!

 
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Todd J Heron
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      11-27-2005, 02:03 AM
<(E-Mail Removed)> wrote in message...
<snipped>
>I cannot create a demand dial VPN connection between 192.168.0.1 and
>192.168.2.1 using their public ips. I can however create a vpn >between
>192.168.0.21 and 192.168.2.1 using 192.168.2.1's public ip. Same thing when
>going the other way, I can create a vpn to >192.168.0.1 from any box behind
>192.168.2.1 but not that box itself.


>I'm sure this problem is related: When i try to remote desktop to
>192.168.2.1 (on either 192.168.2.1 OR it's public IP) from any box
>behind the linksys router i get the following error: The connection was
>ended because of a network error. But I can remote desktop from >any box in
>192.168.0.x.


>This is very strange because when I run a tracert from 192.168.6.x to
>92.168.2.1 I get the correct response. I have been trying to link >these
>two networks together for a long time now with no success. Any help would
>be greatly appreciated!


Basically you want to create a site-to-site VPN between 192.168.0.1 and
192.168.2.1 while at the same time you want these boxes to accept
client/server (AKA remote Access VPN capabilities)? I don't think you can
have both modes of RRAS VPN active at the same time.

--
Todd J Heron, MCSE
Windows Server 2003/2000/NT; CCA
----------------------------------------------------------------------------
This posting is provided "as is" with no warranties and confers no rights


 
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Bill Grant
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      11-27-2005, 02:05 AM
Are you trying to establish a link between the routers so that the two
sites can route from one to the other? This is a very different situation
from establishing a simple connection from one machine to a RRAS server.

There is quite a bit of info in the server help files about site to site
VPN links. The essential difference between site to site and a normal
client-server connection is the routing. A client-server connection only
gives you a host route from server to client. To get the two sites to route
through the link, you need demand-dial interfaces on both routers, and you
need routes linked to these interfaces to route the traffic from one site to
the other through the VPN link.

(E-Mail Removed) wrote:
> Here is the network layout I am trying to achieve:
>
> Network A Network B
> [public ip, 192.168.0.1]---[(cable router)]
> | |
> | [public ip, 192.168.2.1]
> | |
> | |
> [192.168.0.21]-| [192.168.2.2, 192.168.6.1 (linksys router)]
> | |
> [192.168.0.22]-| |-[192.168.6.10]
> |
> [192.168.0.xx]-|
>
> Both 192.168.0.1 and 192.168.2.1 are windows 2003 boxes wih RRAS
> installed.
>
> I cannot create a demand dial VPN connection between 192.168.0.1 and
> 192.168.2.1 using their public ips. I can however create a vpn between
> 192.168.0.21 and 192.168.2.1 using 192.168.2.1's public ip. Same thing
> when going the other way, I can create a vpn to 192.168.0.1 from any
> box behind 192.168.2.1 but not that box itself.
>
> I'm sure this problem is related: When i try to remote desktop to
> 192.168.2.1 (on either 192.168.2.1 OR it's public IP) from any box
> behind the linksys router i get the following error: The connection
> was ended because of a network error. But I can remote desktop from
> any box in 192.168.0.x.
>
> This is very strange because when I run a tracert from 192.168.6.x to
> 192.168.2.1 I get the correct response.
>
> I have been trying to link these two networks together for a long time
> now with no success. Any help would be greatly appreciated!



 
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