https://onwar.se/ 2026-09-30T08:55:20+00:00 https://onwar.se/ https://onwar.se/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2026-09-30T07:14:34+00:00 Anonymous (anonymous@undisclosed.example.com) https://onwar.se/doku.php?id=understanding_dns_port_53:the_backbone_of_internet_name_resolution&rev=1790752474&do=diff Accessibility: Devices with public IP addresses can be accessed from anywhere on the internet. This accessibility is essential for web servers, email servers, and other services that need to be reachable by users worldwide. When a port is closed, any incoming request to that port will be rejected or ignored, typically with a response indicating that the connection cannot be established. Closed ports are often a sign of good security practices, as they limit the number of entry points that attac…