If you can't get through a firewall that you're behind, and you do not have administrative control over the firewall, you can get around this issue by bypassing normal port numbers using port 80 in cPanel. To access your website control panels or webmail, try these URLs:
- http://cpanel.domain.com
- http://whm.domain.com
- http://webmail.domain.com
Remember to replace "domain.com" with your actual domain name.