Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
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Hello all. I am wondering why do certain networks insist on you registering your hardware (MAC) address of your network device before you are allowed to access the LAN. How unique are these addresses and can they be falsified so that I don't need to register? Don't worry about
me trying to do anything nefarious.
Thanks for any help,
Networks require you to register your MAC because they assume most people don't know how to change them and they want some kind of per-machine tracking. By default each machine has a unique MAC, but that doesn't mean you can't change that Some networking devices will even let you assign multiple MACs to one device, and permanently change your MAC (in the firmware).
Apart from the above, the reason could also depend on what hardware you're connecting to, and under what circumstances. Many Cisco switches that support VLANs can be configured to assign a given MAC address (and therefore, logically, a certain machine) to a given VLAN. This, to my mind, would only really be useful in a situation where machines are moved around a lot.