dhcpd config for mac addresses

jqcaducifer · 09-30-2006, 08:48 PM

Hello,

I have a dhcpd server on a linux router currently. Its subnet includes a wireless access point where people can connect to. I want to set up the dhcp server in such a way that only hosts (determined by MAC address) can get an IP, and all other computers can't. So far, I have something like

Code:

ddns-update-style ad-hoc;

authoritative;

subnet 10.10.10.0 netmask 255.255.255.0 {
        range 10.10.10.2 10.10.10.20;
        max-lease-time 604800;
        default-lease-time 604800;
        option domain-name "domainname.com";
        option subnet-mask 255.255.255.0;
        option broadcast-address 10.10.10.255;
        option routers 10.10.10.1;
        option domain-name-servers 10.10.10.1, ...., ....;

        host hostname1 {
                hardware ethernet 00:00:00:00:00:00;
                fixed-address 10.10.10.30;
        }

But how do I only give IP addresses and access to only the people who with MAC addresses specified in host...?

Thanks

acid_kewpie · 10-01-2006, 12:58 PM

i'd assume you simply remove the range option, then it can't allocate anything.

jqcaducifer · 10-01-2006, 02:00 PM

Yep. Its that simple. I thought it would be a completely different setup, but guess not; thanks!

jqcaducifer · 10-02-2006, 05:39 PM

Hi,

I had a related question: When I use the current setup in dhcp, IP addresses aren't allocated to ones who aren't on the host {} list. However, someone can still hardcode an ip address with the correct subnet and router settings, and go through my router. In what ways can I prevent this so that only hardware addresses I specify can be accepted onto my network?

Thanks

acid_kewpie · 10-03-2006, 01:34 AM

without things like managed switches you really can't stop access at some level. you can block access out of a router based on mac addresses generally, but outside of that there is no one point of access...