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
  • Under review
Bug
  • Attach files
  • J Phil commented
    14 Sep, 2018 09:35pm

    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. 

  • Aleksandr Podaruev commented
    14 Sep, 2018 08:04am

    desktop skype 8.2 works fine

  • Aleksandr Podaruev commented
    12 Sep, 2018 01:23pm

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

  • Eric Lawrence commented
    12 Jun, 2017 03:02pm

    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.