Performing a basic port scan (nmap -F jeondong.or.kr)
Nmap scan report for jeondong.or.kr (112.175.85.201)
Host is up (0.13s latency).
Not shown: 82 closed ports
PORT STATE SERVICE
21/tcp open ftp
22/tcp open ssh
23/tcp filtered telnet
25/tcp open smtp
80/tcp open http
81/tcp filtered hosts2-ns
110/tcp open pop3
113/tcp filtered ident
135/tcp filtered msrpc
139/tcp filtered netbios-ssn
443/tcp open https
445/tcp filtered microsoft-ds
587/tcp open submission
873/tcp filtered rsync
3128/tcp filtered squid-http
3306/tcp open mysql
5000/tcp filtered upnp
5432/tcp filtered postgresql
Nmap done: 1 IP address (1 host up) scanned in 13.11 seconds