FreeBSD port command?
 

Anyone know if there is a command to show what ports are being used by what app?

A portscanner should tell you which ones are running/open. I don't think its easily possible to tell what is actually running on that port unless its a standard (ie: 25 for SMTP, etc...).

WG

Type "netstat", and look for services in the "LISTEN" state...

netstat -n if your dns lookups are being slow.

To see what process is using what port, install lsof from ports (/usr/ports/sysutils/lsof) and look at the TCP entries...