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SSL Authentication Error - Handshake failed due to an unexpected packet format.

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Im
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Im asked on 05 May 2018, 08:58 PM

https://i.imgur.com/MMCM2Ni.png

As you can see above, im using C# and its returning a Handshake Error (sslStream.AuthenticateAsClient(host)).

This is ONLY occuring if I connect via proxy to ipv4:8888 (Fiddler's Proxy).

If I were to close off fiddler and use another proxy, or no proxy at all, it would work fine.

 

Honestly clueless as to why its occuring. My library had 1 other connection issue due to incorrectly syncing a stream.read for a statusline check causing fiddler to show a red/yellow icon (https://i.imgur.com/VSSRShi.png) but I sorted that out.

 

Now im just trying to figure out why this is occuring.

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Alexander
Telerik team
answered on 16 May 2018, 03:44 PM
Hi,

What cryptographic protocols is the server you are trying to connect to demanding? Also what protocols are enabled in Fiddler - Tools -> Options -> HTTPS -> Protocols?

Regards,
Alexander
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Alexander
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