FreeBSD Check TCP/UDP Open Port or Services

Prasetiyo Hadi Purwoko

Tue, Jul 1, 2014 - One minute read - 93 words

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.

check TCP connection
```
sockstat -Ptcp
```
check UDP connection
```
sockstat -Pudp
```
Combine with grep to search port used by specific service or service which using specific port.

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>