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18 Essential Network Ports:

A Must-Know Guide for Secure and Efficient IT Operations:

Some Important Ones are:

FTP (File Transfer Protocol) – TCP/21
Purpose: Used for transferring files between clients and servers.

SSH (Secure Shell) – TCP/22
Purpose: Provides a secure channel for remote login and command ex*****on.

Telnet – TCP/23
Purpose: Offers unencrypted, text-based remote login.

SMTP (Simple Mail Transfer Protocol) – TCP/25
Purpose: Responsible for sending email from clients to mail servers and between mail servers.

DNS (Domain Name System) – UDP/TCP/53
Purpose: Translates human-friendly domain names into IP addresses (and vice versa).

DHCP Server – UDP/67
Purpose: Assigns IP addresses and network configuration parameters to DHCP clients.

DHCP Client – UDP/68
Purpose: Used by client machines to receive IP address leases and network settings from the DHCP server.