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We have Windows Server 2008 R2 running TMG 2010. TMG acts as our proxy so it has a listener for secure sites, and it listens on port 443.

We also want to run IIS on the same server. But I can't start the Default Site because I get this error:

The process cannot access the file because it is being used by another process.

So I have assigned a second IP address from our ISP to the external interface of the server. I have changed the bindings in IIS to use this new IP address. But it still keeps saying the above and won't start the site.

However, I do have a listener in TMG also listening on this second IP address on port 443 which is supposed to accept incoming connections and pass them to IIS. Is there any way around this? I need TMG to listen on xxx.xxx.xxx.xxx:443, and pass it to IIS's default site.

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TMG is probably listening on "all interfaces". You need to restrict it to the primary IP, is my best bet. –  jishi Oct 10 '12 at 12:31
In IIS you can specify which port the site is listening on, and change it from 443 here. –  kafka Oct 10 '12 at 12:31
Thanks, I've changed all the TMG listeners so they are specific. And in IIS I have changed the port to 449. The site does start. But where in the TMG web server rule do I put 449? Is it under Bridging? Or somewhere on the listener too? –  Name Oct 10 '12 at 12:53
Why would you use 449? –  jishi Oct 10 '12 at 13:08
Well we have a listener on TMG which listens on port 443, and this listener has HTML forms authentication. The IIS site on the same box also wants to listen on port 443, but we don't want HTML forms auth for this site. So I had to make a second listener on TMG, assigned it to a second external interface, but IIS won't let me start the site uneless I change the bindings to another port like 449. But if I do that, I don't if I need to change it on the TMG listener? –  Name Oct 10 '12 at 13:16

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