Nmap scan report for it4all.vn (180.93.3.141)
Host is up (0.28s latency).
Not shown: 87 filtered tcp ports (no-response), 9 filtered tcp ports (admin-prohibited)
PORT    STATE SERVICE
21/tcp  open  ftp
22/tcp  open  ssh
80/tcp  open  http
443/tcp open  https

Nmap done: 1 IP address (1 host up) scanned in 7.12 seconds