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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>We have been fighting with getting RabbitMQ to work with SSL enabled using the .NET client, and we have finally tracked down the root cause.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We were seeing the handshake timeout issue mentioned in this thread:<o:p></o:p></p><p class=MsoNormal><a href="http://old.nabble.com/handshake_timeout-td33108733.html">http://old.nabble.com/handshake_timeout-td33108733.html</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>“{handshake_timeout,handshake}”<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It turns out that Microsoft has a default policy that tries to connect to Windows Update on the internet to validate Certificate Authorities. If the client machine is not connected to the internet (our likely customer deployment scenario and our development environment), then this can cause a 15 second delay when validating certificates. Since the RabbitMQ handshake timeout is 10 seconds, then this fails and closes the connection. This was only seen from the .NET client, and not the Java client.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I verified that disabling the local machine policy (directions here <span style='color:#1F497D'><a href="http://technet.microsoft.com/en-us/library/cc749331%28v=ws.10%29.aspx">http://technet.microsoft.com/en-us/library/cc749331%28v=ws.10%29.aspx</a>) </span>allowed the SSL connection to immediately succeed.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>My question is this… Is there any way we could have the handshake timeout increased to something higher (20 seconds?) when SSL is enabled? This would save us a lot of hassle explaining to customers why communications fail and requiring them to enable the AD policy exception.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-James<o:p></o:p></p></div></body></html>