Service Subdomains Use the cPanel Service SSL
Last modified: August 28, 2019
In cPanel & WHM version 11.40 and earlier, visitors who accessed a website via
https without an SSL configuration saw a connection error.
In cPanel & WHM version 11.42 and later, we modified Apache’s configuration to properly use service subdomains (proxy subdomains) with SSL.
Service subdomain (proxy subdomain) virtualhosts now handle SSL and non-SSL connections separately.
Each service subdomain’s (proxy subdomain’s) virtualhost explicitly binds to all of the assigned IP addresses on a server.
SSL virtualhost configurations — such as the
webmailservice subdomains (proxy subdomains) — use the cPanel service SSL certificate.
In cPanel & WHM version 62 and later, cPanel & WHM enables SNI functionality by default for SSL certificates on service subdomains (proxy subdomains). SNI allows multiple SSL certificates to use a single IP address and port number.
Due to these changes, Apache uses cPanel’s service SSL certificate to secure websites that do not have an SSL certificate. Visitors to sites without an SSL certificate may see an SSL warning, because Apache used cPanel’s service SSL certificate to secure the site.
How to bypass the use of service subdomains (proxy subdomains) and the cPanel service SSL certificate
To prevent the use of the cPanel service SSL certificate for the
webmail subdomains, you must perform the following steps:
Disable the Service subdomains setting in the Domains section of WHM’s Tweak Settings interface (WHM >> Home >> Server Configuration >> Tweak Settings).Note:In cPanel & WHM version 76, we renamed the Proxy Subdomains setting to Service Subdomains.
Use cPanel’s Subdomains interface (cPanel >> Home >> Domains >> Subdomains) to manually create each service’s subdomain (for example,
Redirect each service’s subdomain to the appropriate secure URL and port as follows:
When you navigate to
webmail.example.com, the server redirects you to
https://example.com:2096 and uses the
example.com domain’s SSL certificate to secure the connection.