Fiddler Ideas

The free web debugging proxy for any browser, system or platform.

Fiddler preventing other programs from having internet connectivity

Not sure if this is a recent change, but I use Microsoft Outlook and Skype, and both are having connectivity issues when Fiddler is running. Also Windows 10 apps seem to be unable to have an internet connection as well.

  • Guest
  • Jun 9 2017
Bug
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  • Eric Lawrence commented
    June 12, 2017 15:02

    Do any applications (e.g. browsers) work through Fiddler? If browsers fail, what is the error message?

    The most likely possibility is that Fiddler's HTTPS certificate hasn't been trusted but needs to be. The second most likely possibility is that you need to push the WinConfig button at the top left of Fiddler and choose to exempt all applications from loopback restrictions so they can connect through Fiddler.