Nmap scan report for host-79-28-30-156.business.telecomitalia.it (79.28.30.156)
Host is up (0.12s latency).
Not shown: 99 filtered tcp ports (no-response)
PORT   STATE  SERVICE
23/tcp closed telnet

Nmap done: 1 IP address (1 host up) scanned in 5.24 seconds