This stands resolved now. Pls visit this thread https://serverfault.com/questions/875229/two-way-ssl-error-400-the-ssl-certificate-error-just-for-client-certificate/875547by vikas027 - Nginx Mailing List - English
I am testing out two-way SSL and I have configured a Root CA, Intermediate CA and created a server and client certificates which are signed by Intermediate CA. This is my configuration file ------------------------------------------------------------------ server { listen 443; server_name server.test.com; ssl on; # App Cert plus Intermediate CA Cert ssl_certificate /root/ca/iby vikas027 - Nginx Mailing List - English