Here you will find example implementations for authenticated server/client communication in several languages. Starting with Java (SpringBootRestX509TestClient & -Server), adding Implementations in PHP & Python are currently in the making ;)
Integrate a service into the ExCELL platform
Securing your vhost using a Let's Encrypt SSL certificate
Create valid client certificates via CSR from scratch!
Test request with SSL client certificate
Upgrade your vHost for SSL client certificate verification