Existe-t-il un moyen de forcer ma machine Linux à toujours démarrer avec une adresse IP auto-assignée ?

Windows Server & IT Pro Active Directory & Entra ID
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1

This is perhaps an unusual request: I’m trying to get a Debian Linux box to always give itself a self-assigned IP address (i.e. 169.254.x.y) on boot. In particular, I want it to do that even when there is a DHCP server present on the LAN. That is, it should not request an IP address from the DHCP server.

From what I can see in the “man interfaces” text, there is an option for “manual”, and an option for “dhcp”. Manual assignment won’t do, since I need multiple boxes to work on the same LAN without requiring any manual configuration… and “dhcp” does what I want, but only if there is no DHCP server on the LAN. (A requirement is that the functionality of these boxes should not be affected by the presence or absence of a DHCP server).

Is there a trick that I can use to get this behavior?

EDIT: By “no manual configuration”, I mean that I should be able to take this box (headless) to any LAN anywhere, plug in the Ethernet cable, and have it do its thing. I shouldn’t have to ssh to the box and edit files to get it working each time it is moved to a different LAN.

2

If you install the avahi-autoipd package, and run it with the --force-bind option in a custom init or if-up.d script, you will always get a link-local address.

You can then use iface eth0 inet manual in your interfaces(5) file, although you will need to edit /etc/network/if-up.d/avahi-autoipd to add manual to the method lines.

There is more information about avahi-autoipd on the Avahi wiki.

Personally, I would edit /etc/network/if-up.d/avahi-autoipd to with something like: