MAC Block and PCs

I want to block certain devices, most of the time PCs, from gaining access to other PCs.  I want to do this via MAC blocking.  And I want to do it on the PC - MAC block at the PC, not through a switch or router.

Is this possible or is there any software available that will allow me to do this?
xmouserAsked:
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samsixtyCommented:
There may be a way to explicitly deny access to resources on your computer to certain mac addresses but it is very easy to change your mac address to circumvent this.

You could block everything apart from specific mac addresses but again, spoofing your mac address is easy to do and you can gain access by using the mac address of an authorized network card.

Wouldn't using software firewalls be a better option?
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PhateonCommented:
Please let us know the kind of set up you have.
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xmouserAuthor Commented:
Phateon:

A couple of file servers - 2003 , some PCs that have some data on it that they want secure.  However, they want to MAC block at the device.  Using VLANs, Routers, Switches, etc. is not an option.

samsixty:

Software firewall?  Sure, which ones do I need to look at?  I'm looking at a bulletproof solution and there is money for commercial versions.
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PhateonCommented:
Server_and_Domain_Isolation_Using_IPsec_and_Group_Policy_v1.1.zip

http://www.microsoft.com/downloads/details.aspx?FamilyId=404FB62F-7CF7-48B5-A820-B881F63BC005&displaylang=en

Please let me know if it is of use for you.
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xmouserAuthor Commented:
A quick search of the doc and I'm not seeing anything in this about MAC Blocking.  MAC blocking is the only option I want to explore.
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PhateonCommented:
MAC blocking per se is very unsecure as MAC spoofing is very much possible.

Zone Alarm Pro seems to do it. Here is a link which was used to allow access for a PS3: http://forum.zonealarm.com/zonelabs/board/message?board.id=cfg&message.id=51526
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