How I configure syslog included specific string at /var/log/ltm ?

Hi Jiwook ,

In that case, you could check this article which discusses the built-in SSL certificate expiration monitoring. The check-cert utility runs weekly and does create log messages regarding the certificates. I checked in my own environment and did see the messages get logged to syslog.

K14318: Monitoring SSL certificate expiration on the BIG-IP system (11.x - 16.x)

The messages would look similar to this:

01420008:4: Certificate 'CN=host.example.com' in file /Common/host.example.com.crt will expire on Mar 20 23:59:59 2022 GMT

Thanks,
Josh