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handshake failed due to an unexpected packet format

Hi,

I have a thick client deployed on a bunch of remote sites, and they all use a central web service (https - the client just default accepts the cert). One site has a proxy and works fine (the software has a proxy config area). Another site has a proxy as well, however on the test machine when they try and login after entering their proxy details, they receive this error;

"The handshake failed due to an unexpected packet format."

Does anyone have any idea? The web service still works for the other remote clients so i think it might be coming from the proxy? Or the proxy is doing something to my traffic before it sends it out? I cannot replicate this error and cannot visit or get a remote login to this particular external site, so its very hard to troubleshoot!!

Any info anyone could give on this would be great!!
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tsgjsy
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tsgjsy
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1 Solution
 
aaronblumCommented:
Not sure if I'll be able to help but listing the proxy server details (like proxy engine and protocol types) might help experts help you.
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tsgjsyAuthor Commented:
Their firewall was blocking HTTPS. thanks for the reply.
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tsgjsyAuthor Commented:
put me in the right direction
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