Making Windows 8 Metro Apps Exempt to Loopback Restrictions

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Making Windows 8 Metro Apps Exempt to Loopback Restrictions

Post by syntax » Thu Oct 17, 2013 6:59 pm

If you have the windows firewall enabled you should be able to use this information here to make your applications exempt: ... ption.aspx

I was getting error trying to use those tools: "the utility was unable to collect a list of AppContainers on the system. (Netlso error code 0x6F4), unable to enumerate AppContainers"

I *think* this was because I have the windows firewall disabled and I couldn't enable it due to group policy restrictions. So I found another way to make them exempt.

Download and Fire up process monitor. Then in the process list, find the metro app you want to unblock. The end of the command line will indicate the metro app:
screen1.png (80.81 KiB) Viewed 5320 times
Then click the security tab and scroll down to AppContainer. Click on that and you'll get the SID. You can copy it:
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Open an elevated command prompt window and type "CheckNetIsolation loopbackexempt -a -p=SID" where SID is the sid you just copied:
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You can type "CheckNetIsolation loopbackexempt -s" to view all added exceptions.

Now you can use fiddler. Note that you may also have to do another hack to get the apps to use the proxy server: netsh winhttp import source=ie

see: ... tem-ie-etc

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