In order to setup SSL certificate in DirectAdmin, under Advanced Features click SSL Certificates. To install certificate you should get dedicated IP address, otherwise, you’ll get error page. Now you need to create a certificate request, then take the request to certificate vendor to purchase a certificate. Select Create your own self signed certificate and Create A Certificate Request. Enter your company details and click Save. Certificate request will be generated. You should use it when purchasing certificate from certificate vendor. When you’ve purchased new certificate, go back to SSL Certificates. Select Paste a pre-generated certificate and key and paste and paste your new certificate under ------END RSA PRIVATE KEY-----. Click Save to install your new SSL certificate.