Within your web page, for example index.asp or index.php you can access system variables:
response.write "<br>Host : " & Request.ServerVariables("HTTP_X_FIREWALL_HOST")
response.write "<br>IP : " & Request.ServerVariables("HTTP_X_FIREWALL_IP")
response.write "<br>Country : " & Request.ServerVariables("HTTP_X_FIREWALL_COUNTRY")
echo "<br>Host : " . $_SERVER["HTTP_X_FIREWALL_HOST"];
echo "<br>IP : " .$_SERVER["HTTP_X_FIREWALL_IP"];
echo "<br>Country : " .$_SERVER["HTTP_X_FIREWALL_COUNTRY"];
You must enable the "IIS Module" to have access to these system variables.