If you are not able to access cpanel/webmail/WHM with port ?
Solution : make sure your httpd.conf has the alias's for them
ScriptAlias /cpanel /usr/local/cpanel/cgi-sys/redirect.cgi
ScriptAlias /whm /usr/local/cpanel/cgi-sys/whmredirect.cgi
ScriptAlias /webmail /usr/local/cpanel/cgi-sys/wredirect.cgi
