[K12OSN] deny IP based on MAC address....how?

Jim Hays haysja at sages.us
Mon Oct 4 00:48:20 UTC 2004

try looking at

man dhcpd

and serch for deny

That may have the info you want.

Quoting David Trask <dtrask at vcs.u52.k12.me.us>:

> Hi all,
> I have a situation....I have an IP address that I believe is infected with
> a worm that putting significant traffic on my network.  The IP address is
> internal and I don't for the life of me know where it is.  I've tried
> everything to find it.  I know the MAC address from the logs on my DHCP
> server....what I'd like to do is prevent that MAC address from even
> getting an IP address.   Is this possible?  I'm using an FC 1 server as my
> DHCP server (that's all that particular server does...just DHCP).  I have
> no desire to populate my entire dhcpd.conf file with all the MAC addresses
> in my building....there's too many.  What I simply want to do is deny
> giving an IP address to a particular machine (whose MAC address I
> know)....and/or deny access to my network (from inside) to that IP
> address.  (I've statically assigned that IP to that MAC in my dhcpd.conf
> so I can at least track it, but now I need to shut it down)  Any ideas?
> David N. Trask
> Technology Teacher/Coordinator
> Vassalboro Community School
> dtrask at vcs.u52.k12.me.us
> (207)923-3100
> _______________________________________________
> K12OSN mailing list
> K12OSN at redhat.com
> https://www.redhat.com/mailman/listinfo/k12osn
> For more info see <http://www.k12os.org>

Jim Hays
Technology Director
Monticello CUSD#25
Monticello, IL  61856

More information about the K12OSN mailing list