I have a query that has totally baffled me: I work as a CCTV engineer by trade and it is becoming incresingly common to use IE and custom software to offer remote viewing of DVR platforms. I have installed and commissioned hundreds to date, they are very very simple. Until this one...
The set-up consists of an SBS2008 server and x-number of client machines, all XP until recently. The new PC is on Win7 Pro 64-bit OS. The LAN uses DHCP from the server in the range of 10.0.0.x, the DVR system sits on the outside of the LAN firewall and uses an address 213.249.2xx.xxx etc.
From any PC at my home, at my office and all the XP machines at this premises this IP address can be input to IE or the manufacturers software and the images are displayed fine. If you do the same from the Win7 PC you get connection errors on the CCTV software and IE hangs and has to be forced closed.
I have tried everything I can think of to address this problem, such as:
-turning firewalls off on group policy
-running in safe mode
-changing the assigned IP address (seperate from DHCP)
-logging on to the PC rather than the domain (always have admin rights)
-running in compatibility modes
-running the app. as administrator
BTW- no AV software is installed or running.
The strangest thing is that if the DVR is brought inside the LAN and given a 10.0.0.x address, the Win7 machine works perfectly in IE and through the CCTV software. That proves that there isn't a hardware/software compatibility issue with Win7.
All I can think is that a Win7 registry entry or security service is or isn't running that is causing this to happen.
I would really appreciate any feedback as I'm pulling my hair out with this one.
Thanks in advance,