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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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
Fiddler and Silverlight Cross-Domain Requests
I’ve recently heard from a number of Silverlight developers who report that certain cross-domain web service requests from their applications work properly with Fiddler running, but fail when Fiddler is not active. Using lower-level tools like NetMon or by watching server logs, the developers note...
21 Nov 2010
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
Automatic Authentication with the Request Builder
The Request Builder feature in recent versions of Fiddler includes a number of enhancements, including the ability to follow HTTP redirections, and to automatically authenticate (using the current user's credentials) to servers that demand authentication using the NTLM or Negotiate (NTLM/Negotiate) challenge...
12 Aug 2010
No, Fiddler is not evil
Recently, a number of people have emailed me and indicated that their security software raised warnings or blocked their download of Fiddler from the official Fiddler website . Now, I’ve reached out to vendors to help them correct their false-positives, but there are many vendors of “security”...
7 May 2010
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