any idea how to RDP to local machines through IAS2004?

we have a sbs2003 server with 2 network cards 'internal 10.10.1.2' and 'external 10.20.1.2'
we have a draytek router 10.20.1.1' and ISA 2004 on the server.
it has worked fine with the local clients having 10.10.1.* addresses and accessing the internet through the ISA proxy.

we wanted to setup a user up on vpn so I created the PPTP VPN connection on the draytek router and told it to give the user the ip 10.20.1.202
that works fine and once connected i can rdp to the server.

i cant however rdp to any other local machine 10.10.1.*

I have set ISA to allow everything, what else should I set?
I cant seem to get it to route through to the internal network.

the only thing I can thinl of is to disable one of the nics on the server and bring the draytek router on to the same network as the local machines '10.10.1.1' ??
lorne2005Asked:
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Firmin FrederickConnect With a Mentor Senior IT ConsultantCommented:
far as i can tell your dual nic configuration is not using NAT or forwarding which would allow bridging between the two NICs and allow the remote session to traverse the different subnet addresses you're using.

In ISA server there is an option in the network configuration to enable NAT but to be honest it's been so long since I used ISA I cannot be more specific - sorry.
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Firmin FrederickSenior IT ConsultantCommented:
Don't quote me but I vaguely recall it being part of the network design/configuration settings (not the actual firewall rules) in ISA server.
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lorne2005Author Commented:
Figured it out. I had to add a static route in to the routers routing table. Thanks for the ideas though. It got me on the right track.  I did a pathping from the remote workstation and realised it was routing from the router back out to the ISP because it didn't recognise the internal network address.
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lorne2005Author Commented:
Thanks
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Firmin FrederickSenior IT ConsultantCommented:
well thank you for your genorosity even though you solved it yourself! I'll commit your solution to memory :)
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