FreeBSD Check TCP/UDP Open Port or Services

In this short tutorial I will show how to check TCP/UDP open port or services in FreeBSD box. For checking open port or services which uses port in FreeBSD simply issue the following commands.

1. check TCP connection

   sockstat -Ptcp
   

2. check UDP connection

   sockstat -Pudp
   

   Combine with grep to search port used by specific service or service which using specific port.

3. use grep to get service or port

   sockstat -Ptcp | grep <port number>
   sockstat -Ptcp | grep -i <service name>
   sockstat -Pudp | grep <port number>
   sockstat -Pudp | grep -i <service name>