header('Content-Type: text/plain');
echo "Server: " . gethostname() . "\n";
echo "Remote Addr: " . ($_SERVER['REMOTE_ADDR'] ?? '') . "\n";
echo "X-Forwarded-For: " . ($_SERVER['HTTP_X_FORWARDED_FOR'] ?? '') . "\n";
echo "X-Real-IP: " . ($_SERVER['HTTP_X_REAL_IP'] ?? '') . "\n";
echo "X-Forwarded-Proto: " . ($_SERVER['HTTP_X_FORWARDED_PROTO'] ?? '') . "\n";