Forum Discussion
I had a similar issue when upgrading from 10.2.1 to 11.4.1. I also had to reconfigure the SSL renegotation settings due to the RFC5746 issue. From the F5 try opening a test SSL session to the server: openssl s_client -connect 123.123.123.123:443 and then note the cipher in use on the remote device.
SSL-Session: Protocol: TLSv?? Cipher: ????
Have a look at the difference in protocols in the cipher suites between the versions:
Version 10:
http://support.f5.com/kb/en-us/solutions/public/10000/200/sol10262.html
Version 11:
http://support.f5.com/kb/en-us/solutions/public/13000/100/sol13156.html
The solution for my problem was to disable TLSv1.1 and TLSv1.2 in the options section of the profile:
Enabled Options: No TLSv1.1 No TLSv1.2
I hope this helps.