Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

Nuruddin_Ahmed_'s avatar
Nuruddin_Ahmed_
Icon for Cirrostratus rankCirrostratus
Dec 21, 2016

Client Certificate sr number validation - irule

Hi I have a virtual server which has a client ssl profile to validate the client certificate (require), as an additional security, we want to allow a client with a specific serial number only to co...
application delivery
irules
LTM
Ed_Summers's avatar
Ed_Summers
Icon for Nimbostratus rankNimbostratus
Dec 21, 2016

Your test is for "00:f3:f8:d0:2b:87:42:a1:05:4f:27:5f:dc:2c:41:66:c6", but the log indicates that the system pulled "f3:f8:d0:2b:87:42:a1:05:4f:27:5f:dc:2c:41:66:c6". Note that the BIG-IP will strip leading zeroes when using X509::serial_number - actually a function of underlying OpenSSL returning the value (see ).

 

Need to change your iRule to remove the leading zeroes.