Fiddler Web Debugger
Fiddler is a web debugging tool which is owned, developed, and distributed by Eric Lawrence.
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Fiddler Web Debugger
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.NET HTTPS connections timeout on SNI TLS Warning
Recently, a handful of folks have emailed me complaining that some HTTPS sites cannot be reached by their .NET programs or from any program when Fiddler is configured to decrypt traffic. Notably, these users only have problems when running on Windows Vista or later. So, what’s going on? When...
28 Mar 2012
Fiddler and Windows 8 Metro-style applications
Over on StackOverflow, a new Windows 8 user asked how to get Fiddler working with new Windows 8 Metro-style applications. These applications work somewhat differently than classic desktop applications, and require a bit of special configuration work to get Fiddler to work properly. Fear not, however...
14 Sep 2011
Fiddler and Channel Binding Tokens Revisited
Just under a year ago, I wrote a blog post about how the new “Extended Protection” feature (also known as Channel Binding Tokens or CBT) prevented seamless decryption of certain authenticated HTTPS traffic when Fiddler is running. The quick recap is that CBT binds a set of NTLM or Kerberos...
4 Sep 2011
Debugging Windows Phone 7 device traffic with Fiddler
Back in October, I showed how to debug Windows Phone emulator traffic with Fiddler . Since then, I’ve acquired the LG Quantum phone, and naturally, one of my first goals was to start looking at the traffic from mobile Internet Explorer and some of my WP7 applications. The process for capturing...
8 Jan 2011
Fiddler and Channel-Binding-Tokens
Note: Please see this post for an update. Some users of Fiddler who have HTTPS Decryption enabled have found that some of their internal HTTPS sites that used to work properly with Fiddler now endlessly prompt for credentials while Fiddler is running. Even typing the correct credentials into the authentication...
15 Oct 2010
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