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Download and install Fiddler Everywhere, if necessary.
Since you won't be able to interact with Fiddler's GUI when it's running in the background as a service, prepare it for "headless" use.
For example, we set up AutoSave,
to automatically save a snapshot of traffic every few minutes:
Make sure everything works as you expect.
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Download and install AlwaysUp, if necessary.
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Start AlwaysUp.
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Select Application > Add to open the Add Application window:
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On the General tab:
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In the Application field, enter the full path to the Fiddler executable, Fiddler Everywhere.exe.
If you installed Fiddler Everywhere in the default location, this is:
C:\Users\<USER-NAME>\AppData\Local\Programs\Fiddler Everywhere\Fiddler Everywhere.exe
where <USER-NAME> is the name of the Windows account where you installed the program.
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In the Name field, enter the name that you will call your application in AlwaysUp.
We stuck with Fiddler Everywhere but you can specify virtually anything you like:
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Switch to the Logon tab and specify the user name and password for the Windows account where you installed and run Fiddler.
That's because Fiddler's proxy may not be available in other accounts:
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Click over to the Startup tab and check the Ensure that the Windows Networking components have started box.
This informs AlwaysUp that Fiddler needs the TCP/IP networking stack properly initialized before it can start its work:
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We're done configuring Fiddler so click the Save button to record your changes.
In a couple of seconds, an application called Fiddler Everywhere (or whatever you called it) will appear in the AlwaysUp window.
It's not yet running though, and the state will be "Stopped":
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To start capturing with Fiddler, choose Application > Start "Fiddler Everywhere".
The state will transition to "Running" and Fiddler will be capturing packets in the background (on the
isolated Session 0 desktop).
You can see the Fiddler by selecting Application > Restart "Fiddler Everywhere" in this session.
That will quickly stop the application and start it again on your desktop.
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That's it! Next time your computer boots, Fiddler Everywhere will start logging your web traffic immediately, before anyone logs on.
We encourage you to edit the application in AlwaysUp and check out the many other settings that may be appropriate for your environment.
The 110+ page user's manual (PDF) describes them all.
