Fiddler 4.6 cannot connect to strong SSL?

Question

Error:

[Fiddler] The connection to '<the site>.com' failed. 
System.Security.SecurityException Failed to negotiate HTTPS connection with server.fiddler.network.https> HTTPS handshake to <the site>.com (for #3) failed. System.IO.IOException Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. < An existing connection was forcibly closed by the remote host 

I can hit fine in web browser. I do see it is rather strong SSL (FireFox reports it as TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, 256 bit keys, TLS 1.2)

Why isn't Fiddler able to make this connection?

Answer 1

Seems that your client didn't try to connect via 1.2

Check: Tools > Fiddler Options > HTTPS It's set to <client>;ssl3;tls1.0

Add "tls1.2" to the protocols list

Edit: Refer to the image below for where to find the option: