On 20/04/2021 09:27, Jack Craig wrote:
on the other hand, ... ;O
nmap -sS 108.220.213.121 Starting Nmap 7.80 ( https://nmap.org https://nmap.org ) at 2021-04-19 18:26 PDT Nmap scan report for ws (108.220.213.121) Host is up (0.0014s latency). Not shown: 994 closed ports PORT STATE SERVICE 80/tcp open http 443/tcp open https 631/tcp open ipp 5000/tcp open upnp 8200/tcp open trivnet1 20005/tcp open btx
Nmap done: 1 IP address (1 host up) scanned in 0.15 seconds
So, port 53 is shown as closed since you don't have that in your list of IP to listen on.