I was playing with nmap on my local network and I was wondering why all of my other devices have port 53/tcp open (router, 2 raspberry pies and an android phone). Only my main machine (source of nmap scan) did not show any open ports. As far as I can tell when I was poking in my RPi with ss I was n…

Mystery solved. :smiley: I totaly forgot that some years ago I was messing with my router NAT settings and it was redirecting all dns requests to correct dns server. So that machines on my network would not call dns like 8.8.8.8. :nerd_face: For example a call to 192.168.0.5:53 (which has no port o…

EndeavourOS

Nmap open port 53/tcp

General system Newbie

SweSG June 29, 2021, 6:28pm 2

Port 53 is usually DNS.