Performing a basic port scan (nmap -F strijen.info)
Nmap scan report for strijen.info (185.133.88.165)
Host is up (0.15s latency).
rDNS record for 185.133.88.165: pvm-jasperpcservice1.srvnl.nl
Not shown: 89 filtered ports
PORT STATE SERVICE
21/tcp open ftp
25/tcp open smtp
53/tcp open domain
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 6.87 seconds