Exact Client public certificate authentication using Nginx

[Sekhar]

Hi Maxim,

Thanks for replying to the post. Below is my concern. 

Multiple certificate can have the same DN and the DN name match will happen
after the SSL handshake is complete using the root CA. It means the SSL
layer is complete and we are doing authorization not authentication.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,238050,238059#msg-238059