Fiddler 2 CONNECT static.cdninstagram.com:443 HTTP/1.1

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Fiddler Classic
ali
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ali asked on 04 Mar 2023, 03:05 PM

HTTP/1.1 502 Fiddler - Connection Failed

 

http://static.cdninstagram.com:443

 

showing http? and port 443 this is normal?

it works but some subqueries don't work


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Nick Iliev
Telerik team
answered on 06 Mar 2023, 07:44 AM

Hello Ali Kaptano─člu,

 

Seeing only non-secure HTTP requests on port 443 means that you are seeing the CONNECT Tunnel request to the Fiddler proxy that you are not seeing the actual HTTPS request, probably due to failed TLS handshake (learn more on what are CONNECT Tunnels).

Ensure that you have successfully installed and trusted the Fiddler Classic root certificate and enabled the capturing and decrypting of HTTPS traffic.

Apart from the above, note that you can capture traffic from most web pages in a browser (for example, the Instagram page). Still, you won't be able to capture HTTPS traffic from most Android/iOS applications (learn why here...) or some desktop applications that are not explicitly trusting user-installed certificates. 

 

 

 

Regards,
Nick Iliev
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Nick Iliev
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