Before configuring the SSL with node.js, please ensure that you have your 'Private Key', 'Certificate' and 'Intermeidate(s)' certificates. You might have received the following certificates from COMODO.

1) your_domain_name.crt (or) OrderNumber.crt - It is your Server Certificate

2) Intermediate Certificates, it depends upon the type of Certificate you purchase. Mostly, you will get them in the following format.

Ex: 'COMODORSAXXXXXXXXXSecureServerCA.crt' and 'COMODORSAAddTrustCA.crt'

Note: You may have received a .ca-bundle file, which includes those Intermediate Certificates. In this case, please download the appropriate certificate from Downloads.

1. Create an https_server.js file using the following values. you can create file with any name using .js extension.

# vim https_server.js

var https = require('https');
var fs = require('fs');

var https_options = {
  key: fs.readFileSync("/path/to/private.key"),
  cert: fs.readFileSync("/path/to/your_domain_name.crt"),
  ca: [
          fs.readFileSync('path/to/COMODORSAXXXXXXXXXSecureServerCA.crt'),
          fs.readFileSync('path/to/COMODORSAAddTrustCA.crt') 
       ]

};

https.createServer(options, function (req, res) {
 res.writeHead(200);
 res.end("Welcome to Node.js HTTPS Servern");
}).listen(8443)

2. Now use the following command to start node.js application created in above step.

# node https_server.js

3. To verify the installation, you can use our SSL Analyzer.