Fiddler Ideas

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Fiddler default cert maker should limit certificate validity to 820 days

Otherwise, Chrome may reject the certificate with ERR_CERT_VALIDITY_TOO_LONG

  • Eric Lawrence
  • May 17 2018
  • Needs review
  • Attach files
  • Eric Lawrence commented
    May 17, 2018 17:39

    Workaround for End-Users until Telerik Fixes this:

    Run about:config in QuickExec to edit prefs.

    The fiddler.certmaker.ValidDays preference controls the validity length, which defaults to five years; however, fiddler.certmaker.GraceDays is 366 by default (meaning cert validity starts one year ago). 

  • idb commented
    May 17, 2018 18:23

    I'm actually missing those settings in QuickExec, though I am running the latest version of FIddler. Am I doing something wrong here?

  • Eric Lawrence commented
    May 17, 2018 18:42

    The setting value(s) must be typed in directly. Default values are not shown in the about:config tab.