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Print custom headers set by Varnish to display the different IP's and print the X-Forwarded-For header
echo "Client IP: " . $_SERVER["HTTP_X_CLIENTIP"]. "<br />".PHP_EOL;
echo "Server IP: " . $_SERVER["HTTP_X_SERVERIP"]. "<br />".PHP_EOL;
echo "Local IP: " . $_SERVER["HTTP_X_LOCALIP"]. "<br />".PHP_EOL;
echo "Remote IP: " . $_SERVER["HTTP_X_REMOTEIP"]. "<br />".PHP_EOL;
echo "X-Forwarded-For: " . $_SERVER["HTTP_X_FORWARDED_FOR"]. "<br />".PHP_EOL;
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