Why Fiddler allows my WPF application to work properly over VPN connection

4 posts, 0 answers
  1. Caroline Beauvais
    Caroline Beauvais avatar
    3 posts
    Member since:
    Oct 2009

    Posted 10 Nov 2016 Link to this post


    We do have a WPF application that send http request and web service calls to a server. We are also using TLS 1.2.

    Everything is working find except when we run over a VPN connection. At one point, our web service call seems to be get stuck and the client do not get any response back from the server (and no timeout).

    The VPN client software that is currently in used by the customer is Cisco AnyConnect version 3.x version.

    Now when I run Fiddler 2, to investigate the issue , everything is working fine !

    Why Fiddler would avoid our web service call to be stuck ? Is there a way I can run Fiddler in a mode that I could debug our problem ?

    Any suggestion would be appreciated ...


  2. Tsviatko Yovtchev
    Tsviatko Yovtchev avatar
    549 posts

    Posted 15 Nov 2016 Link to this post


    There is a pretty good blog post by Eric explaining the most common reasons for this behavior - http://www.telerik.com/blogs/help!-running-fiddler-fixes-my-app-. Have you checked it out?

    Tsviatko Yovtchev
    Telerik by Progress
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  3. AK
    AK avatar
    2 posts
    Member since:
    Oct 2018

    Posted 31 Oct 2018 in reply to Caroline Beauvais Link to this post

    Hi Caroline, were you able to figure out the reason? I'm running into the same issue but can't find a solution.
  4. AK
    AK avatar
    2 posts
    Member since:
    Oct 2018

    Posted 31 Oct 2018 in reply to Tsviatko Yovtchev Link to this post

    Hi Tsviatko: Great blog post from Eric but nothing mentioned applies to this issue. Any other pointers?
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