/**
* Change the HTTP header to retrieve the real IP address.
*
* @param string $header Valid HTTP header name.
* @return void
*/
public static function setAddrHeader($header = 'REMOTE_ADDR')
{
$header = strtoupper($header);
$allowed = SucuriScan::allowedHttpHeaders(true);
if (array_key_exists($header, $allowed)) {
$message = 'HTTP header was set to <code>' . $header . '</code>';
self::update_option(':addr_header', $header);
SucuriScanEvent::report_info_event($message);
SucuriScanEvent::notify_event('plugin_change', $message);
SucuriScanInterface::info($message);
} else {
SucuriScanInterface::error('HTTP header is not in the allowed list');
}
}