title: Check if port is open from the server itself
body: <p>I've a Centos 6.5 - Apache server. This server is in a private LAN (it has a private IP 10.x.x.x) and is linked to a domain name. If I test port 443 from webtools with the domain name, it seems that it's blocked, but I want to understand if it's blocked from a firewall outside the server or if it depends from the server configuration. Is there anyway I can check if the port is open for the server?</p>
  
  <p>iptables firewall is empty.</p>