[Gllug] Is there such a thing as reverse DHCP?
john at sinodun.org.uk
Sun Jan 16 13:36:22 UTC 2011
I make use of WakeOnLan facilities to start up a few machines remotely
or automatically. Currently I have a small collection of scripts called:
each of which contains the relevant MAC address hard-coded into the
script. I'd like to have just a single script, called perhaps just
"wake" which one could invoke with:
Obviously I could put all the MAC addresses in the single script, but
that then still has to be maintained.
My DNS server knows the IP address of each box, so I can use that to
translate the name into an IP address, but what I need is the target
machine's MAC address. My DHCP server knows the mapping from MAC
address to IP address (usually used that way around), but is there any
way to ask it to provide the information the other way? That is, send
it a query giving an IP address and have it return a response with a MAC
address - the MAC address to which it would assign the given IP address?
So far I've failed to find such a query.
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