Changed IE behaviour when Fiddler is installed

2 posts, 0 answers
  1. peter
    peter avatar
    1 posts
    Member since:
    Jun 2014

    Posted 17 Jun 2014 Link to this post

    I installed Fiddler on my PC to debug a communication issue between my PC running an ordering application through IE8 (same issue with IE11) and an external catalog application. The strange thing is that when Fiddler is installed, the application is working correctly. On PC's where Fiddler is not installed, we get error messages. As soon as we install Fiddler, the application works perfectly.
    ​The issue manifests itself with the user not obtaining an automated logon to the web site via the OCI 4 interface when using the standard IE8 browser settings. When Fiddler is installed, the issue disappears.
    Any idea what behavior Fiddler could change to make this working?
    Thanks in advance for your support.

  2. Eric Lawrence
    Eric Lawrence avatar
    832 posts

    Posted 17 Jun 2014 Link to this post

    Hi, Peter!

    This post:!-running-fiddler-fixes-my-app- explains the most common scenarios in which Fiddler "magically" fixes a site just by running Fiddler.

    It sounds like you might be saying that Fiddler isn't even *running*-- it's just installed? If that alone helps, it's either a coincidence, or someone had unchecked the default setting of "Use HTTP/1.1 through proxy servers" setting inside IE's Tools > Internet Options > Advanced. (That's the only change to the browser that Fiddler makes upon install.)

    Eric Lawrence

    Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

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