Error - Failed to register Fiddler as the system proxy

3 posts, 0 answers
  1. Giri
    Giri avatar
    2 posts
    Member since:
    Sep 2019

    Posted 11 Sep 2019 Link to this post

    When I try to run FiddleApplication.Startup(startupConfig)

    FiddlerCoreStartupSettings startupSettings = newFiddlerCoreStartupSettingsBuilder() .ListenOnPort(0) .RegisterAsSystemProxy() .DecryptSSL() .Build(); FiddlerApplication.Startup(startupSettings);

    In my log events I see:

    Starting FiddlerCore/4.6.20191.7809 ...
    ** LogString: !WARNING: The DefaultLAN Gateway information could not be obtained.
    ** NotifyUser: Error - Failed to register Fiddler as the system proxy.


    I'm running the process as administrator.

    Note: When I run the normal Fiddler UI application everything works fine. Even running an older FiddlerCore version (2.3) is able to register itself as the system proxy.


    P.S - I also see a warning in Visual Studio - "Please use Telerik.NetworkConnections.NetworkConnectionsManager to register the FiddlerCore Proxy as the system proxy." But I couldn't find any documentation/examples using NetworkConnectionsManager and I couldn't figure out how to use it.
    fiddlercore fiddler-dev
  2. Giri
    Giri avatar
    2 posts
    Member since:
    Sep 2019

    Posted 11 Sep 2019 in reply to Giri Link to this post

    I have asked the same questions on StackOverflow with better formatting : https://stackoverflow.com/questions/57870029/error-failed-to-register-fiddler-as-the-system-proxy
  3. Eric R | Senior Technical Support Engineer
    Admin
    Eric R | Senior Technical Support Engineer avatar
    388 posts

    Posted 12 Sep 2019 Link to this post

    Hi Giri,

    Unfortunately, the NetworkConnectionsManager is relatively new and the documentation isn't ready yet. Although, there is a pretty thorough explanation of how to use the Namespace at the How Do I Use Telerik NetworkConnections NetworkConnectionsManager forum thread.

    Please review the forum post and let me know if you need any additional information. Thank you for using the Fiddler Forums.

    Regards,


    Eric R | Technical Support Engineer
    Progress Telerik

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