I'm looking to open up a port 5566 on my server. I've added 5566 to SYSTEM > FIREWALL. My router doesn't block any ports. This site http://www.yougetsignal.com/tools/open-ports/ shows Port 5566 is closed on 220.127.116.11. IP Tables Code: PAROLE tcp -- anywhere anywhere tcp dpt:5566 ACCEPT udp -- anywhere anywhere udp dpt:domain ACCEPT udp -- anywhere anywhere udp dpt:mysql ACCEPT udp -- anywhere anywhere udp dpt:5566 DROP icmp -- anywhere anywhere DROP all -- anywhere anywhere When I attempted to telnet from my workstation to ip address 18.104.22.168:5566 it failed and was trying to open port 23. I need to make sure that port 5566, which is what the API uses to connect the web pages to the database is allowed through the firewall. Does anyone know how I can troubleshoot this?