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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal style='background:white'><span style='color:#222222'>I am in the process of upgrading our existing (SSL enabled) clusters (RabbitMQ 3.1.3 and Erlang R16B01) to the most recent versions (RabbitMQ 3.2.2 and Erlang R16B03) and I encountered an issue which may be a problem with the SSL/TLS implementation on the latest version of Erlang?<o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'> <o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'>We have the RabbitMQ Management webui load-balanced via F5 LTMs on Port 443 using Client/Server SSL profiles to terminate SSL at the appliance in order to use cookie persistence to a node.<o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'> <o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'>After updating our Dev cluster, traffic would no longer be sent to the nodes when traversing the LTMs. Digging into the logs, I found the following F5 error:<o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'> <o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'> 01260017 - Connection attempt to insecure SSL server (see RFC5746) aborted: XX.XX.XX.XX.:443.<o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'> <o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'>There is a workaround present in the F5 KB on the issue:<o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'> <o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'> Note: If upgrading the back-end SSL server is not an option, you can set the Secure Renegotiation setting in the Server SSL profile to Request, which will allow the back-end SSL server to continue to renegotiate insecurely.<o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'> <o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'><a href="http://support.f5.com/kb/en-us/solutions/public/13000/800/sol13860" target="_blank"><span style='color:#1155CC'>http://support.f5.com/kb/en-us/solutions/public/13000/800/sol13860</span></a><o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'> <o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'>Hitting a node directly with Firefox, you can see the following error in the Error Console:<o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'> <o:p></o:p></span></p><p class=MsoNormal style='background:white;orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='color:#222222'> server does not support RFC 5746, see CVE-2009-3555<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='color:#222222'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='color:#222222'>Our current Test/Qual/Prod clusters on the previous version (3.1.3 and R16B01) all work without issue.<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='color:#222222'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='color:#222222'>Thoughts?<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='color:#222222'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='color:#222222'>Thanks<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:#222222;background:white'>-- </span><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:#222222'><br></span><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222'>Jared</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#222222'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>