Its a common case that when your client or you are trying to open your default webmail interface by accessing URL like https://yourdomain.com:2096 that using Port 2096 which is disabled by some firewall like ISA or other firewall product , the solution is simple , you have to enable access the webmail as subdomain URL , by enabling Proxy subdomains.
According to cPanel documentation : In cPanel & WHM version 11.40 and earlier, visitors who used https to access a site that did not have SSL configured saw a connection error.
In cPanel & WHM version 11.42 and later, they modified Apache’s configuration to properly use proxy subdomains with SSL:
Service | Standard port | Secure port | Proxy subdomain |
---|---|---|---|
cPanel | 2082 | 2083 | cpanel.yourdomain.com |
Webmail | 2095 | 2096 | webmail.yourdomain.com |
WHM | 2086 | 2087 | whm.yourdomain.com |
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