I'm trying to set up a load balancer via an Nginx reverse proxy. My application uses client certificates to authenticate clients. I would like my reverse proxy to forward the client certificate to my back-end servers. I have added this line to my reverse proxy's configuration to store the client certificate information in a custom HTTP header:
proxy_set_header X-SSL-CERT $ssl_client_cert
$ssl_client_cert uses multiple lines to store the certificate, and my back-end nginx server does not recognize this properly as one HTTP header. What is the best way to achieve forward my client certificates?
This question has been asked in 2013 on this forum, but so far no real solution: https://forum.nginx.org/read.php?2,236546,236546