How to print domain name and SAN from client certificate using Irule

Subject can be retrieved with [X509::subject [SSL::cert 0]]. See https://devcentral.f5.com/wiki/iRules.X509__subject.ashx for more details and an example

 

SAN shows up in the extensions. There's an example of how to walk through them:

 

https://devcentral.f5.com/wiki/iRules.X509__extensions.ashx

 

BTW, the wiki is very useful.