Bug ID 456766: SSL Session resumption with hybrid handshake might fail

Last Modified: Dec 15, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
11.4.1, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2

Fixed In:
11.6.0, 11.5.4, 11.4.1 HF10

Opened: Apr 10, 2014
Severity: 2-Critical
Related AskF5 Article:


When using SSL session resumption during a hybrid handshake (sslv2 with tls1.0), the resumption might fail.


Session resumption would fail, necessitating a complete handshake to reconnect.


SSL session resumption is allowed, and is using a hybrid handshake.


Disable SSL Session Cache

Fix Information

SSL Session resumption now works in all expected cases.

Behavior Change