Proxy to upstream HTTPS server *with different* keys/certs in nginx

[tbamise]

> 
> you are using client certificates, which is way you need a certificate
> + key
> on the nginx side to connect to upstream https.
> 

I am using client certificates on nginx side to connect to  upstream https.
Issues is when I turn on client verification on upstream server, nginx
doesn't provide the client certificates.

Any ideas why? 
Thanks much appreciated!

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,247305,247431#msg-247431