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"Capture Traffic" button and indicator

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Fiddler Classic
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Alex
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Alex asked on 06 Nov 2014, 01:49 PM
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.

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Alex
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answered on 06 Nov 2014, 01:51 PM
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...)
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Eric Lawrence
Telerik team
answered on 06 Nov 2014, 07:08 PM
"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
 

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Eric Lawrence
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