Linux dhcp mac address filtering

What this does is stop dhcpd from sending DHCPNAK responses to the requesting device, allowing it to receive additional replies from the other server on the network. So far so good. I see the include file already "supports" this because it has the following clause which queries the "disableauthoritative" variable:. I never thought that this option: not authoritative; has that meaning. So there can be 2 or more DHCP servers running on same subnet?

Doesn't it cause conflicts? I would like to comment: Thank you for this patch! I added a comment to the issue to request again a checkbox for this. Nothing other than lots of stuff including pfSense defaulting to class C, and usually X sometimes. Other than learning a new subnet mask, and possibly gateway addresses, nothing to it. I also chose to shift to the class B space when doing this, but didn't feel I really needed spaces in any timeframe I could imagine, so I picked sizes that seemed likely to be more than adequate for the foreseeable future for my nets.

That doesn't become a problem?? If I knew more about how to contribute to the project I would probably try to author this patch myself. I only had to type a few MAC addresses for devices that it was easier to do that for than to find and power up. With the equivalent of four Class C blocks I'm not having any issues with broadcasts or scanning looking for services. Not every user, but enough.

I'm pulling for IPv6 to finally deliver the promised land one of these days…. I have both "types of service" and physical location prefixes. As host of the pfSense open source firewall project, Netgate believes in enhancing network connectivity that maintains both security and privacy. We also believe everyone should be able to afford it. Product information, software announcements, and special offers.

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See our newsletter archive for past announcements. Register Login. This topic has been deleted. Only users with topic management privileges can see it. I am having a strange issue and need to do this for troubleshooting purposes… thanks guys for any advice. Reply Quote 0 1 Reply Last reply.

Configure the DHCP server to provide the correct information. Yes, some more information: voip phones are from another large and indifferent vendor and I have no access to change or even inspect their settings. I think this makes any of those proposed solutions impossible? I don't think you can disable handing out leases with classes though can you? I've just tested it and it works. The ipfw L2 method should also work in theory, but I haven't tested it yet. A case similar to yours can be found here : The infrastructure department doesn't want to pre-configure the phones when they are delivered which is very comprehensible, because they would have to administrate several thousands of them , so the phones don't know anything about a local configuration.

I found a solution, I had to enable the directive not authoritative; What this does is stop dhcpd from sending DHCPNAK responses to the requesting device, allowing it to receive additional replies from the other server on the network. I see the include file already "supports" this because it has the following clause which queries the "disableauthoritative" variable: if! I hope a GUI option to control this flag might be added for pfSense 2.

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Take Control of your IP Addresses with a DHCP Server on Linux

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Accepted Answer

Well I'm not sure what you are tring to achieve. I don't know any way to do this just using DHCP.

A reserved address can be issued to a nominated MAC address. Do you have Ideas? Someone may come along and contradict me but in my experience I have never seen this.

CentOS 7: Setup a DHCP server and provide specific IP based on MAC address – vokogawuxa.tk

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