Realizar un escaneo de puertos básico (nmap -F rttv.ru)
Nmap scan report for rttv.ru (109.73.15.186)
Host is up (0.19s latency).
Not shown: 98 filtered ports
PORT STATE SERVICE
80/tcp open http
443/tcp open https
Nmap done: 1 IP address (1 host up) scanned in 10.70 seconds