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802.1x Machine Authentication

Posted on 2004-09-22
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Last Modified: 2008-08-06
We use Active Directory and we have a Cisco ACS 3.2 appliance and all Cisco switches. Most machines ar XP Pro and some 2000. We have a problem of unsolicited machines plugging into our network and it's a big network. I  would like to use 802.1x PEAP with MSCHAPv2 for machine authentication. I was doing a little research and it sounds like I won't need to install a certificate on each computer (very nice). The ACS will require a certificate from a CA however.

So, can I use a private certificate for my ACS box? Buying a public certificate is way too expensive and this is not a public service. The client will look for some kind of root authority so that's why I'm wondering...

Here is the link where I found all this info:

http://cisco.com/en/US/products/sw/secursw/ps2086/products_configuration_example09186a00801df0e4.shtml

Also- fyi, I want to use this for wired, not wireless as shown in example using Cisco 2950 switches (I can handle the switch setup).
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Question by:mikesparker
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RonCharette earned 125 total points
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Mike,
All you would need to do is create your own root authority.  As this is a large network, pick a server to house your root CA and go to town.  An example of a Root CA setup is at:

http://www.microsoft.com/technet/prodtechnol/winntas/maintain/security/hier3.mspx#EDAA

Hope this helps!
Ron Charette
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