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Fiddler is unable to connect to my https server and is failing in the CONNECT stage itself. Firefox opens the site just fine. Here [1] is a screenshot of the requests. I tried with Charles and it was able to list the request but failed to decrypt the requests [2].
Please note that other HTTPS services seem to be working fine with fiddler
1: http://imgur.com/Zzu8lKS
2: http://imgur.com/dAbz6AK
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Fiddler is a free web debugging proxy that logs all HTTP/HTTPS traffic between your web application and the Internet.
Configure Fiddler Classic Click Tools > Options. Click the HTTPS tab. Ensure the Decrypt HTTPS traffic checkbox is checked. Click the Export Fiddler Root Certificate to Desktop button.
When run on Windows 7 and later, Fiddler 4 can use the TLS 1.1 and TLS 1.2 protocols when communicating with secure servers; simply enable these protocols inside Tools > Fiddler Options > HTTPS > Enabled Protocols.
Click Tools > Options > HTTPS. Click the Decrypt HTTPS Traffic box.
Tools/Options/HTTPS ... Change TLS1.0 to TLS1.2 worked for me ...
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I did add Fiddler root certificate in IE and Firefox. Still I was getting this ..... System.Security.Authentication.AuthenticationException A call to SSPI failed The function requested is not supported fiddler
I solved this by adding tls1.2 & tls1.2 under Tools--> Fiddler Options --> HTTPS (Tab) --> Enabled Protocols, and Fiddler started capturing https traffic from browsers.
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I had a similar issue with all SSL sites. It seems to happen when there are a lot of certs in the following folder C:\Users\<username>\AppData\Roaming\Microsoft\SystemCertificates\My\Certificates
stopping fiddler, emptying the folder and starting it up again fixed the issue for me.
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What worked for me:
Tools -> Fiddler Options -> HTTPS -> Reset All Certificates
Then I got prompted to create a new Fiddler certificate and trust it via windows.
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