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DHCP : don't respond to a particular mac address

Hello,

I'm an happy home user, but I'm encountering a little issue : I'm an Orange Open user, with TV box.

Obviously, the TV box need to have it's parameter served by the Internet box, and not the Sophos UTM.

My Sophos UTM is between my network and my VDSL box. So it can see everything on the network.

But I want him to ignore everything that come from a particular mac address, even the DHCP request.

I tried to add a filtering rule based on the mac address of the TV box, but it seems to only work only when the TV box got its IP address.

With the ISC DHCP server, you have the ability to use the ignore-booting flag. You create a static entry in your config file and you just specifiy the ignore-booting option. I tried to add this to the configuration file of the DHCP server, but it seems to disappear at every reboot, as I expected.

Is there a clean way to do so ?

Thanks a lot for your answer.

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