Nmap scan report for tr1.node.check-host.net (185.23.17.21)
Host is up (0.18s latency).
All 100 scanned ports on tr1.node.check-host.net (185.23.17.21) are in ignored states.
Not shown: 100 closed tcp ports (reset)

Nmap done: 1 IP address (1 host up) scanned in 3.08 seconds