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Mac Addresses

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by raharr

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Does anyone know how I can trace a mac addresses or have any suggestion to the following?

I have a copy of bridges that connect two of my buildings. They are set up so only the two talk to each other. On the inside of the remote building, I have a couple of users. When I check to see what MAC addresses are trying to attach, I find a list of them. I also have several other wireless point around the campus, but on the two bridges talk to each other. I want to find out who the other mac addresses belong too so I can block them from even trying to connect. Suggestions?

5 replies

by zaferus

MAC addresses have the first part by manufacturer, and there are web sites that will let you know what type of NIC is it - but this may not help you that much.

If you know the systems IP there are programs that let you scan the system, and it will provide the computer name and username of the person logged in. This might help you more. There are lots out there (like NetScanTools for instance).

If you set up MAC security and only allow the systems you want to connect this would help more. As well if you supress your SSID broadcasts than only people who know what the WAP SSID (identity) is can connect to it.

Further if you put encryption on the WAP, than only people who know the SSID, have an authorized MAC and know the shared secret can connect. This is getting to be descent security.

by mshavrov

As is was suggested, it's easier to create a list of "authorized" MAC addresses, and reject everything else. Trying to catch all "unauthorized" wireless clients is near to impossible. It's easier to use "deny everything that not permitted" approach.

And as an additional security measurement, disable SSID broadcasting and turn on encryption. It will kick out most of "unauthorized" clients.

Good luck,

Michael
http://www.ciscoheadsetadapter.com

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