Realizar un escaneo de puertos básico (nmap -F fukuoka-leapup.jp)
Nmap scan report for fukuoka-leapup.jp (162.43.122.178)
Host is up (0.11s latency).
rDNS record for 162.43.122.178: sv14577.xserver.jp
Not shown: 90 filtered tcp ports (no-response)
PORT STATE SERVICE
21/tcp open ftp
25/tcp open smtp
80/tcp open http
110/tcp open pop3
143/tcp open imap
443/tcp open https
465/tcp open smtps
587/tcp open submission
993/tcp open imaps
995/tcp open pop3s
Nmap done: 1 IP address (1 host up) scanned in 2.87 seconds