"Capture Traffic" button and indicator

4 posts, 0 answers
  1. Alex
    Alex avatar
    5 posts
    Member since:
    Oct 2014

    Posted 06 Nov 2014 Link to this post

    Hello.
    I want to understand the logic of "Capture Traffic" button in the bottom left corner of Fiddler window.
    My first thought was that Fiddler would capture traffic (I mean, show sessions in Sessions list) only when this button is pressed.
    But later I've noticed that Fiddler is always capturing sessions, no matter is this button pressed or not. All filters on my "Filters" tab are disabled; "Troubleshoot filters" menu item is unchecked too.
    I have a feeling that I've misunderstood the purpose of "Capture Traffic" button. Where can I read more about it?
    Thanks.
  2. Alex
    Alex avatar
    5 posts
    Member since:
    Oct 2014

    Posted 06 Nov 2014 in reply to Alex Link to this post

    Oh, and one more thing - Fiddler manual is saying "Ensure Capture Traffic is enabled" to capture Web traffic. But I do not see any difference...)
  3. Eric Lawrence
    Admin
    Eric Lawrence avatar
    833 posts

    Posted 06 Nov 2014 Link to this post

    "Capture Traffic" concerns whether Fiddler has registered itself as the system proxy (using WinINET; see IE's Tools > Internet Options > Connections > LAN Settings).

    If traffic is sent to Fiddler (e.g. you manually point Firefox's proxy settings to 127.0.0.1:8888) then that traffic is shown in the Web Sessions list, regardless of the state of the "Capture Traffic" checkbox. 

    Regards,
    Eric Lawrence
    Telerik
     

    Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

     
  4. Alex
    Alex avatar
    5 posts
    Member since:
    Oct 2014

    Posted 06 Nov 2014 in reply to Eric Lawrence Link to this post

    "Capture Traffic" concerns whether Fiddler has registered itself as the system proxy.


    As I notice, it is taken into account only if "Act as system proxy on startup" checkbox is checked in Fiddler "Options -> Connections" window. If WinINET options are adjusted manually to "localhost:FiddlerPort", all traffic is shown in the Web Sessions list, regardless of the state of the "Capture Traffic" checkbox.
    That was interesting, thank you.
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