By default VX uses port 8000 to listen and port 9000 to respond. The port numbers can be set by the user. To set the ports use "vx -port 3000:4000". This will start VX and VX will listen on port 3000 and respond on port 4000. To send a command to this instance of VX use "vx -r hostname:3000:4000 command". The hostname argument can be the word "local", a computer name as it is recognized on the network, or an IP address such as 192.168.1.1. If the word "local" is used for the hostname, a new instance of VX will be started if it is unable to connect to an already running instance, or if no instances are currently running.