Hi All,

I am using Nginx 1.4.4 as reverse proxy for my tomcat server. My problem is: SSL handshake failed between Nginx and tomcat with mutual SSL authentication. I have verified that Client to Nginx with mutual SSL is working. But if my upstream backend is also using https:mutual port, the path will fail with error:
[error] 1816#3436: *23 SSL_do_handshake() failed (SSL: error:14094412:SSL routines:SSL3_READ_BYTES:sslv3 alert bad certificate:SSL alert number 42) while SSL handshaking to upstream, client: xx.xx.xx.xx, server: xx.xxx.xxx.xxx, request: "GET / HTTP/1.1", upstream: "https://xx.xx.xx.xx:8082/", host: "xx.xx.xx.xx:8002"

My upstream server https://xx.xx.xx.xx:8082 is using mutual SSL and working perfectly without Nginx.
the Nginx host https://xx.xx.xx.xx:8002 is using mutual SSL and also working perfectly without the upstream mutual ssl or with only http port.
The problem is: when both Nginx and upstream require mutual SSL, and I would like to pass the client certificate to Nginx then to my upstream server, the SSL handshake error occurs.

I have tried to add client cert in headers, but no luck. Here is part of my nginx config
####
server {
listen xx.xx.xx.xx:8002;
server_name xx.xx.xx.xx;

ssl on;
ssl_certificate C:/nginx-1.4.4/cert/MyServer.crt;
ssl_certificate_key C:/nginx-1.4.4/cert/MyServer.key;

ssl_client_certificate C:/nginx-1.4.4/cert/MyCA.pem;
ssl_trusted_certificate C:/nginx-1.4.4/cert/MyCA.pem;

ssl_prefer_server_ciphers on;
ssl_verify_client on;
ssl_verify_depth 3;
ssl_protocols SSLv2 SSLv3 TLSv1;

access_log C:/nginx-1.4.4/logs/access_8002.log;
error_log C:/nginx-1.4.4/logs/error_8002.log debug;

root html;
index index.html index.htm;

location / {
proxy_pass https://10.128.103.47:8082/;
proxy_redirect default;
proxy_set_header Host $host:$server_port;

proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Client-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Ssl on;
proxy_set_header X-Client-Verify $ssl_client_verify;
proxy_set_header X-SSL-Client-Cert $ssl_client_cert;
proxy_set_header X-SSL-Client-Serial $ssl_client_serial;
proxy_set_header X-SSL-Client-Verify $ssl_client_verify;
proxy_set_header X-SSL-Client-S-DN $ssl_client_s_dn;

}
}

Is this usage supported by Nginx?
I would be very grateful if someone can point me some clues or suggestions.

Thanks and Best Regards,
Flash008