Mutual Auth irule issues

Hi Team,

 

I need a help here is understanding what actually this irule is doing.We have a scenario have this irule deployed and the CN has been whitelisted under the datagroup trusted_certs.I have observed an intermittent issues with it.It was been working fine and on a fine day it stopped and again it started working.I did have done SSL dumps to and it shows the connection resets by F5 VIP.

 

On logs it indeed gives me the messege as client cert received with all CN OU etc and very next it gives as No Matching Client Certificate Was Found Using the same CN OU values.

 

Hence would like to understand other than CN value if it checks for anything else and can figure out a permanent fix for the issues.

 

It would be really of great help.Many thanks in advance.