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
  • Needs review
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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.

  • Aleksandr Podaruev commented
    September 12, 2018 13:23

    i have problems only with skype 12 on windows 10
    browsers works fine

  • Aleksandr Podaruev commented
    September 14, 2018 08:04

    desktop skype 8.2 works fine

  • J Phil commented
    September 14, 2018 21:35

    Hi guys,

    I found a solution. In Fiddler, navigate to Tools > Win8 Loopback Exceptions, check the box for Skype and/or other apps that you don't want affected/intercepted. Click the Save Changes button at the top. Close the window. Voila. Worked for me on Windows 10.