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Can't RDP to ISA over Cisco VPN

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Can't RDP to ISA over Cisco VPN - 7.Jan.2008 12:30:06 PM   
RichStevenson

 

Posts: 18
Joined: 21.Dec.2007
Status: offline
I have a Cisco ASA box sitting directly on the internet. My ISA 2006 box also sits directly on the internet. One is not behind the other. We use the ASA to allow IT to VPN into the network to manage devices. Once ISA was installed, it locked down access via RDP to only my workstation. I was ablt to add the static IP of another admins workstation to the Remote Management Computers, Computer Sets and that worked for RDP.

The problem is that over the VPN tunnel, my IP address is in the 10.254.254.0/24 subnet so the ISA's Firewall Service denies the connection from this network with a result code of  0x0040014 FWX_E_FWE_SPOOFING_PACKET_DROPPED.

I've a number of things to allow this connection to no avail, i.e. adding that subnet to the above Computer Set, creating new Networks and Network Rules, etc. but I must be doing it wrong.

Can someone layout what I need to do in oder to allow RDP over the tunnel to the ISA box?

Thanks,
Rich
Post #: 1
RE: Can't RDP to ISA over Cisco VPN - 7.Jan.2008 1:40:33 PM   
RichStevenson

 

Posts: 18
Joined: 21.Dec.2007
Status: offline
Nevermind, I worked it out.

I added the 10.254.254.0/24 range to the Internal card and created the route with:

route -p add 10.254.254.0 mask 255.255.255.0 {default gateway}

Where {default gateway} is the ip of my ASA box.

Amazing what the proper routing can do for you!

(in reply to RichStevenson)
Post #: 2

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