Bug ID 746355: A client SSL handshake fails when client hello extension contains only unsupported groups

Last Modified: Nov 07, 2022

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6

Opened: Oct 09, 2018

Severity: 3-Major


If the supported groups extension in the client hello contains only groups that are not supported by the BIG-IP system, the handshake fails.


Client connections to the BIG-IP system fail.


-- (ec)dhe ciphers are used. -- The supported groups extension does not contain any groups supported by the BIG-IP system.


There is no workaround other than not configuring (ec)dhe ciphers.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips