Is there a way to allow or disallow certain computers by their MAC number?
ipfw 2 supports firewalling by MAC address, so yes.
This ability comes with the software on my wireless access point, but I prefer that my FreeBSD system hand out the IP addresses, and I cannot find this MAC-filtering ability at man dhcpd.
isc-dhcp3-server-3.0.1.r14_2 is my installed port. Is there another dhpcd to try?
You can specify MAC addresses in your DHCP config to reserve specific IP addresses for specific machines. I'm not sure whether there is a way to tell DHCP not to grant a lease to MAC addresses which are not found, but then, without using a firewall, someone could manually configure a foreign host to use the connection, regardless of whether they can get a DHCP lease.
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