Route - non default gateway issue and how to broadcast it

For tedious reasons I've had to implement a VPN "side by side". At least I think that's how it is termed.

I have a firewall with private IP - 10.0.0.1 (this is also the default gateway)

I have another router providing a site to site VPN - this router is at 10.0.0.253 and the remote subnet is 10.0.1.0

If I ping from a machine, say 10.0.0.2 -> 10.0.1.7, it only works if I add a static route :- route add 10.0.1.0 mask 255.255.255.0 10.0.0.253

However, there is a machine - 10.0.0.7 that I need to be able to ping 10.0.1.7 which isn't a PC and I haven't got immediate access to. It's on a static IP.

Is it somehow possible to "broadcast" to the whole 10.0.0.0 network that the gateway it needs for 10.0.1.0 is at 10.0.0.253 ?


The router at 10.0.0.253 (and at the other end of the VPN) is a Draytek Vigor 2820

The default gateway of 10.0.0.1 is a computer running Forefront TMG as part of Windows EBS


Thanks,
Tim