Realizar un escaneo de puertos básico (nmap -F terminal.co.uk)
Nmap scan report for terminal.co.uk (77.68.103.77)
Host is up (0.14s latency).
Not shown: 92 filtered ports
PORT STATE SERVICE
21/tcp open ftp
22/tcp open ssh
25/tcp open smtp
80/tcp open http
143/tcp open imap
443/tcp open https
990/tcp closed ftps
8443/tcp open https-alt
Nmap done: 1 IP address (1 host up) scanned in 3.45 seconds