Hi,
did you check LTM logs during the failled auth.
maybe you have a specific errors.
you can also my irule in order to see what happening, maybe you will have more details:
https://devcentral.f5.com/s/articles/ultimate-irule-debug-capture-and-investigate-1183
enable only " client_cert 1"
array set app_arrway_referer {
client_dest_ip_port 0
client_cert 1
http_request 0
http_request_release 0
http_request_payload 0
http_lb_selected 0
http_response 0
http_response_release 0
http_response_payload 0
http_time_process 0
}
Keep me in touch.
regards,