:-)  I know you might think am really running away form the problem but if you have layer-2 switches like cisco 2950's why not block those MAC addresses at that layer before they even reach your DHCP server.Well I gave you a cisco solution though you need a Linux one :-)
Ronny
Lule George William wrote:
Thanks Ernest,
Correct me if my interpretation of the conf below is wrong, but I think it 
declares hosts 1, 2 ...(to whichever number I may feel like) along with their 
MAC addresses after which it allows them to pick RANDOM ip addresses from a 
pool.
This will not work in my case because it is hosts with known MAC addresses 
that have their ip addresses fixed and any other to pick a random ip address 
from a pool. 
My problem now is that I want to be ban some MAC addresses from picking an IP 
address completely!

On Friday 17 June 2005 11:59, Ernest Byaruhanga wrote:
  
Lule George William wrote the following on 06/17/2005 10:30 AM:

[...]

    
2. Don't assign an IP address to that MAC address. I haven't
figured a way of doing this. Someone help out there.
      
Assume u use linux, here's what your dhcp.conf file will contain:

        # First deny unknown clients
        deny unknown clients

	#declare all MAC addresses you want to lease to:
	host pc1 { hardware ethernet 00:07:72:3j:c6:a2;}
	host pc2 { hardware ethernet 00:02:60:65:ee:d4;}

	pool {
		range 10.0.0.1 10.0.0.6;
		default-lease-time 6788;
		max-lease-time 78887;
		deny unknown clients;
	}

rgds.
ernest
    

  


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