By wbelk1289
I created a new droplet (Ubuntu 16.04.1) and right after it was created I ran nmap on it to see the open ports. Obviously ssh on port 22 is expected, but I don’t know why the other ports are showing up. Can anybody shed some light on why these ports were showing up as filtered?
user@local_machine $ nmap -A -p- vps_remote_address
Starting Nmap 7.01 ( https://nmap.org ) at - Nmap scan report for vps_remote_address Host is up (0.022s latency). Not shown: 65530 closed ports PORT STATE SERVICE VERSION 22/tcp open ssh OpenSSH 7.2p2 Ubuntu 4ubuntu2.1 (Ubuntu Linux; protocol 2.0) | ssh-hostkey: | Removed (RSA) |_ Removed (ECDSA) 25/tcp filtered smtp 135/tcp filtered msrpc 6666/tcp filtered irc 6667/tcp filtered irc Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ . Nmap done: 1 IP address (1 host up) scanned in 30.22 seconds
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Are you sure that you did a clean install of a new droplet?
If you create a new droplet with one of our base Ubuntu installations you should only have port 22 open remotely, and you can check this from the Droplet directly via the following:
root@droplet:~# netstat -tulpn
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1464/sshd
tcp6 0 0 :::22 :::* LISTEN 1464/sshd
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