How to open a tcp/udp port on FreeBSD 9?

Everything is open by default if you don't have a firewall configured. If you want to know how to configure a firewall to allow access you need to give us more details of your set up.
 
I have a dosbox application, which runs thru winicap, then I want to test it to connect to my Host-adapter-only network) FreeBSD VM with VMWare Player. When I tested it, it said ,ipport.vbx said, Connection failed. That's the story
 
$ sockstat -l4 will show which services are listening for incoming IPv4 connections on TCP or UDP ports.
 
Is your server machine behind a NAT? If so you'll need to port forward requests to its listening port (What is your topology, cause I haven't played VMWare player, so I'm not sure how it routes packets?).
 
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