The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the well-known ports.

DNS Tunneling: how DNS can be (ab)used by malicious actors Mar 15, 2019 What is the difference between DNS over TLS & DNS over HTTPS? DNS over HTTPS uses Port 443, which is the standard port for HTTPS traffic. While having a dedicated port sounds like it would be an advantage, in certain contexts it’s actually quite the opposite. While DNS over HTTPS requests can hide in the rest of the encrypted traffic, DNS over TLS requests all use a distinct port where anyone at the

Why DNS Works On Both TCP and UDP - TechGenix

Port no: 52 is used by Domain Names System (DNS). What is an SMB Port + Ports 445 and 139 Explained | Varonis Mar 29, 2020

DNS: What It Is and What It Does - dummies

How to Choose the Right SMTP Port (Port 25, 587, 465, or 2525) Port 587 is the default port for SMTP submission on the modern web. While you can use other ports for submission (more on those next), you should always start with port 587 as the default and only use a different port if circumstances dictate (like your host blocking port 587 for some reason). Which TCP ports does a workstation use to authenticate to May 31, 2011 How to set up AdGuard DNS