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List of TCP and UDP port numbers - Wikipedia 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. Port forwarding - Wikipedia In computer networking, port forwarding or port mapping is an application of network address translation (NAT) that redirects a communication request from one address and port number combination to another while the packets are traversing a network gateway, such as a router or firewall. How to configure port forwarding on a Windows 10 PC Port forwarding allows you to access network resources as if they’re hosted on your local machine, which can be helpful when working on a LAN (local area network) or developing with web servers. In How to forward ports on your router | PCWorld
How to configure port forwarding on a Windows 10 PC
~]# firewall-cmd --remove-forward-port=port=port-number:proto=
Kubectl port-forward allows you to access and interact with internal Kubernetes cluster processes from your localhost.You can use this method to investigate issues and adjust your services locally without the need to expose them beforehand.
[SOLVED] Ports to forward for Exchange? - Spiceworks