Block DHCP responding from fake DHCP-SERVER ?

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Apr 1st, 2009
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On my local network I have a Linux server provide DHCP services. Recently I had issues with fake DHCP offering from some PCs (either infected by virus or unauthorized DHCP services running). Is anyway I can block all DHCP offering responding and only allow the real one?

Or, beacuse my DHCP server attached to a certain port, can I force DHCP request to that port rather than broadcast ?


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John Blakley Wed, 04/01/2009 - 12:17
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Do you have a Cisco switch that your Linux server connects to? If so, you can enable dhcp snooping and trust the port that your Linux server is connected to.




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