Preventing "classful" route from being added

[c_ausman]

Hello. I am running RAS on a Windows 2003 server and when I connect
from my workstation, a "classful" route (i.e. 172.17.0.0) is added it
my routing table. What I really want is for 172.17.191.0 to be added
(we use class C, not B). Anyway, I understand that when the "Use
default gateway on remote network" option is disabled, this happens. I
need to keep that option disabled, so I am wondering if there is a way
to get rid of the classful route without using a script. I read
KB254231, but it didn't really offer me any advice on how to prevent
this other than checking "Use default gateway on remote network".

Does anyone have any suggestions?

Thanks,
Christine

 

[Bill Grant]

That is correct. If you clear the "use default gateway.." box, only a
subnet route is created to the RRAS server's private address space. The
subnet mask is determined solely by the received IP address (ie it is a
"classful" subnet).

I am not aware of any way to alter that. I think you will need to use
scripting to add additional routing, as you say. The only other suggestion I
can make is that you put the remotes in their own IP subnet and route them
through the RRAS server, rather than relying on the builtin proxy setup
which puts them in the same IP subnet as the LAN machines (eg put them in
172.17.192/24 and enable IP routing on the RRAS server) . If the RRAS server
is not the default gateway for your LAN you may need extra routing to get
the traffic for the remotes to the RRAS server.