Nmap scan report for exam.ipb.ac.id (18.138.93.56)
Host is up (0.18s latency).
rDNS record for 18.138.93.56: ec2-18-138-93-56.ap-southeast-1.compute.amazonaws.com
Not shown: 91 filtered tcp ports (no-response)
PORT     STATE  SERVICE
22/tcp   open   ssh
25/tcp   closed smtp
80/tcp   open   http
443/tcp  open   https
465/tcp  closed smtps
587/tcp  closed submission
2049/tcp closed nfs
8080/tcp closed http-proxy
9100/tcp closed jetdirect

Nmap done: 1 IP address (1 host up) scanned in 3.55 seconds