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.
Jul 16, 2020 · Service names and port numbers are used to distinguish between different services that run over transport protocols such as TCP, UDP, DCCP, and SCTP. Service names are assigned on a first-come, first-served process, as documented in [ RFC6335 ]. PORT NUMBER:--• 18 – MSP (Message Send Protocol) • 20 - FTP (File Transfer Protocol) for data transfer • 21 – FTP (File Transfer Protocol) for data control • 23 – Telnet • 22 – SSH - Remote Login Protocol • 25 - SMTP (Simple Mail Transfer Protocol) for is used for sending mails. • 53 – DNS (Domain Name System) Basically, a DNS server “Domain Name System” is a server which contains the collection of IP address with their corresponding hostname or shall I say the domains. DNS resolvers are used to resolve the IP addresses and domain names. It helps to translate web addresses (like ps4dns.com) to their IP addresses (like 103.168.0.1). Jun 03, 2020 · By default DNS server works on port no. 53 but what if you want to change the default port no. in your machine. I wanted to give a try if it is possible and if yes then in that case how am I suppose to do that. Well here is the solution which I found.
Hello all I seem to be having trouble forwarding DNS to my server. I have setup port forwarding 53 TCP/UDP to my server IP, but when I test it I only get a responce from TCP. To test I set port 53 to UDP only and it failed outright. Just wondering if I'm missing something. Regards Fred
Dec 11, 2013 Domain Name System - Wikipedia
What is SMB Port and Port Number? Which Protocol Uses Port
Solved: DNS port forward - NETGEAR Communities Hello all I seem to be having trouble forwarding DNS to my server. I have setup port forwarding 53 TCP/UDP to my server IP, but when I test it I only get a responce from TCP. To test I set port 53 to UDP only and it failed outright. Just wondering if I'm missing something. Regards Fred dns - Can I configure a subdomain to point to a specific DNS is a simple name to number (IP) resolver. If you have two IPs on the server, you can point each subdomain to each of the IP-addresses and run both servers on the default port on each IP. one.example.com -> 127.0.0.1 (server: 127.0.0.1:25565) DNS: What It Is and What It Does - dummies