Performing a basic port scan (nmap -F nstec.co.jp)
Nmap scan report for nstec.co.jp (164.46.103.199)
Host is up (0.11s latency).
rDNS record for 164.46.103.199: panda-green-494fd055c8b94045.znlc.jp
Not shown: 90 closed tcp ports (reset)
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 1.01 seconds