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I made application which use service at this address: https://webapp2.rzzo.rs/rzzo/RzzoService?wsdl ,before 3 years, and everything works fine. But now on windows 10 it doesn't work. And on earlier version on windows os it works. I try to make a new application from beginning, and when i try to add service reference in Visual Studio 2013 to service on above address, it says:

The request was aborted: Could not create SSL/TLS secure channel. Metadata contains a reference that cannot be resolved: 'https://webapp2.rzzo.rs/rzzo/RzzoService?wsdl'. Could not establish secure channel for SSL/TLS with authority 'webapp2.rzzo.rs'.

I try same procedure on another computer, but now with Windows 7, and there in no errors.

Naum
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1 Answers1

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You need to enable Diffie-Hellman Key Exchange Algorithm in order to make it work. Using Windows Registry Editor (regedit):

  1. Create new key Diffie-Hellman, at location:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\KeyExchangeAlgorithms

  1. Create new DWORD value named Enabled and set it to 1

Restart of machine is not necessary.

Regards, Dejan

RegEdit state after applied changes.

Dejan Vesić
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