Unable to vpn when on same subnet

I am having problems logging into my pptp RAS server when
the client is on a network that has the same IP Subnes as
my RAS server (Private 192.168.1.0/24). If I change the
subnet that the client is on to anything other than
192.168.1.x, the vpn works like a champ. I can
authenticate to the vpn server but unable to ping
anything at my office??

Client: winxp pro
RRAS: Win2K Srvr, and tried it on Win2k3

Anyclues on how to fix this? I assume it's a problem
with the IP routes but unchecking "Make remote gateway
the default" does not fix this issue. What am I missing??


mike

I just tried unchecking "Use default gateway on remote
network" with a host file for my servers seams to have
done the work. I'm not sure though because my home
network that I'm using now has no other devices. When I
was on another network on the same subnet, there were
other devices with the same private ip of my remote
servers. So I'm good or there is something else I need
to do with arp cache...anyone else have same problems?
>-----Original Message-----
>I am having problems logging into my pptp RAS server
when
>the client is on a network that has the same IP Subnes
as
>my RAS server (Private 192.168.1.0/24). If I change the
>subnet that the client is on to anything other than
>192.168.1.x, the vpn works like a champ. I can
>authenticate to the vpn server but unable to ping
>anything at my office??
>
>Client: winxp pro
>RRAS: Win2K Srvr, and tried it on Win2k3
>
>Anyclues on how to fix this? I assume it's a problem
>with the IP routes but unchecking "Make remote gateway
>the default" does not fix this issue. What am I
missing??
>.
>

mike wrote:
> I am having problems logging into my pptp RAS server when
> the client is on a network that has the same IP Subnes as
> my RAS server (Private 192.168.1.0/24). If I change the
> subnet that the client is on to anything other than
> 192.168.1.x, the vpn works like a champ. I can
> authenticate to the vpn server but unable to ping
> anything at my office??
>
> Client: winxp pro
> RRAS: Win2K Srvr, and tried it on Win2k3
>
> Anyclues on how to fix this? I assume it's a problem
> with the IP routes but unchecking "Make remote gateway
> the default" does not fix this issue. What am I missing??

You cannot "fix" this. This is how TCP/IP works. If you are on a 192.168.1.x/24
net your machine will look for the server on your subnet (i.e. the local
network) it will never send traffic to the RAS connection. You can however make
the subnet smaller on the client side. If the mask on the client side is
255.255.255.248 and your address is 192.168.1.1 for example you will send
packets to any address between 192.168.1.8 and 192.168.1.254 because these
machines are not on your subnet.
See this for more information
http://www.cisco.com/warp/public/701/3.html

--
Regards,

Michael Holzemer
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