Anyone have any ideas?

________________________________
From: Jay Dale [[email protected]]
Sent: Wednesday, June 01, 2011 8:52 AM
To: NT System Admin Issues
Subject: RDP through ISA Array

Hey all,

I have a client who is using 2 ISA 2006 servers in an array.  ISA 1 is for the 
internal clients with a subnet of 192.168.0.0 and ISA 2 is the external access 
with a WAN IP and DMZ.  The WAN IP is bound to the NIC along with a block of 
secondary IP's.  They use a web application that, upon clicking a hyperlink 
launches a window that in turn launches an RDP connection to one of the WAN 
links that then runs a Terminal Server application on a 2008 Enterprise server. 
 The problem they're having is that external users can run the application just 
fine, but users on the internal network can't RDP to the WAN address.  They say 
it used to work, but either a patch broke it or something has changed and they 
can no longer access it.  When they click on the hyperlink, a white window 
comes up and then the RDP warning window regarding using the Clipboard comes 
up, but then nothing.

I've tried RDP'ing directly to the WAN address from inside the network and it 
fails.  I try RDP'ing directly to the private IP that it's supposed to point to 
and it works fine.  I've looked in the ISA's and there is a policy that allows 
RDP listening on that WAN IP to forward to the right server, so settings-wise 
it appears to be right, but it doesn't work.  I haven't worked with ISA in 
years and I'm not sure where to go from here - I've tried disabling the RPC 
filter and such but to no avail.

Can anyone point me in the right direction?

Thanks,

Jay


Jay Dale
Senior Systems Administrator
Unetek, Inc.
Phone: 281.574.2414
Email:[email protected]<mailto:[email protected]>

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