Securing web server is a daunting task. No doubt. Apache or Lamp or WAMP depends on ‘Iptables’ rules.
It is very important that you do keep good ‘iptables’ rule. Most of the be spoke application like go autodial , vicidial / vicidalnow opens port and allows you put the server in real ip and gives you login via username and password.
To secure please check your iptables rules and only allow the ip you might use most frequently and else keep others closed.
It is highly formidable to shutdown your iptables and allow all.