Realizar un escaneo de puertos básico (nmap -F turn-next.com)
Nmap scan report for turn-next.com (118.27.122.122)
Host is up (0.10s latency).
rDNS record for 118.27.122.122: www218.onamae.ne.jp
Not shown: 97 filtered ports
PORT STATE SERVICE
21/tcp open ftp
80/tcp open http
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 6.10 seconds