Realizar un escaneo de puertos básico (nmap -F noncolle.com)
Nmap scan report for noncolle.com (162.43.116.122)
Host is up (0.11s latency).
rDNS record for 162.43.116.122: sv13121.xserver.jp
Not shown: 90 filtered ports
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 14.22 seconds