Problem with service param for server

[artel1992]

My service param has port. My site has ssl but plugin add 80 port to service. Why does it happen?
Example:
my site: my.moodle.com
in service param: my.cas.com?service=https://my.moodle.com:80

[mackensen]

The plugin doesn't add a port to the service definition, that has to be coming either from your CAS server or (more likely) Moodle itself.

[artel1992]

Where I can set port in moodle? I sure that my cas server doesn't add port.

[artel1992]

so I find that moodle set port here:
/auth/cas/CAS/CAS/Client.php

private function _getClientUrl()
    {
        if (!empty($_SERVER['HTTP_X_FORWARDED_HOST'])) {
            // explode the host list separated by comma and use the first host
            $hosts = explode(',', $_SERVER['HTTP_X_FORWARDED_HOST']);
            // see rfc7239#5.3 and rfc7230#2.7.1: port is in HTTP_X_FORWARDED_HOST if non default
            return $hosts[0];
        } else if (!empty($_SERVER['HTTP_X_FORWARDED_SERVER'])) {
            $server_url = $_SERVER['HTTP_X_FORWARDED_SERVER'];
        } else {
            if (empty($_SERVER['SERVER_NAME'])) {
                $server_url = $_SERVER['HTTP_HOST'];
            } else {
                $server_url = $_SERVER['SERVER_NAME'];
            }
        }
        if (!strpos($server_url, ':')) {
            if (empty($_SERVER['HTTP_X_FORWARDED_PORT'])) {
                $server_port = $_SERVER['SERVER_PORT'];
            } else {
                $ports = explode(',', $_SERVER['HTTP_X_FORWARDED_PORT']);
                $server_port = $ports[0];
            }

            if ( ($this->_isHttps() && $server_port!=443)
                || (!$this->_isHttps() && $server_port!=80)
            ) {
                $server_url .= ':';
                $server_url .= $server_port;
            }
        }
        return $server_url;
    }

but I don't know what edit the var $_SERVER. Can you help me?