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Author PPTP VPN and subnets
duplessis.deon@gmail.com

2006-06-01, 1:13 pm

Hi everyone,

I have created a PPTP VPN connection successfully from my satellite
branch to my main office, however, even though I am able to specify the
IP address of the VPN connection, I can't set the subnet mask, and when
I connect, I get assigned a mask of 255.255.255.255. This means I can't
access any resources on the remote network, which defeats the object of
the VPN.

Is this normal? Is there a way I can specify my subnet before I
connect? I noticed in the TCP/IP properties of the VPN connection that
I can specify my own IP (which I have done) however there is no
dialogue box for the subnet. The box I remote in to is not a DHCP
server, so I can't specify to be assigned an IP address. Is this the
main problem?

If I turn the box I am remoting in to into a DHCP server, will that
mean the incoming VPN connection will be assigned the correct subnet?

Thanks in advance, I didn't know where else to post this...

Cheers

Deon du Plessis

Simon

2006-06-05, 7:13 pm

duplessis.deon@gmail.com wrote:
> Hi everyone,
>
> I have created a PPTP VPN connection successfully from my satellite
> branch to my main office, however, even though I am able to specify the
> IP address of the VPN connection, I can't set the subnet mask, and when
> I connect, I get assigned a mask of 255.255.255.255. This means I can't
> access any resources on the remote network, which defeats the object of
> the VPN.
>
> Is this normal? Is there a way I can specify my subnet before I
> connect? I noticed in the TCP/IP properties of the VPN connection that
> I can specify my own IP (which I have done) however there is no
> dialogue box for the subnet. The box I remote in to is not a DHCP
> server, so I can't specify to be assigned an IP address. Is this the
> main problem?
>
> If I turn the box I am remoting in to into a DHCP server, will that
> mean the incoming VPN connection will be assigned the correct subnet?
>
> Thanks in advance, I didn't know where else to post this...
>
> Cheers
>
> Deon du Plessis
>

Hi,

Thats normal behaviour for vpn like pptp, it will become your PCs
default route hence the mask. I don't think it's the cause of your
problem. Does the branch office have the same subnet ? , do you run some
poxy firewall like Mcafee or norton that likes to be told to trust the
remote subnet ?
simon
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