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unknown DHCP requests coming from router
Router Model: ARRIS BGW210-700
Software Version: 2.5.6
I've been fed up with the abysmally restricted wifi features of this thing since I switched from cable (with my own DD-WRT access point) to fiber with this junk access point a couple years ago. My complaints are mostly related to DHCP functionality. I've finally taken the plunge and turned off the DHCP service in the router and activated a local DHCP Server on my linux system on my network. Everything is working great! I am finally once again able to allocate every device a fixed IP address as I used to do, instead of being limited to 16. I can finally specify my own DNS choice instead of AT&T's stupid server that advertises at you for typos resulting in nonexistent domains.
Except, this router is flooding me with a DHCPREQUEST for an address outside the range of my "unknown MAC" allocation pool.
This router has 3 MACs listed in it's panels:
4C:12:65:xx:yy:60 -- Wifi 2.5 GHz radio
4C:12:65:xx:yy:61 -- Broadband WAN
4C:12:65:xx:yy:61 -- also Wifi Guest Network ???
4C:12:65:xx:yy:63 -- Wifi 5 GHz radio
(The xx:yy: part is the same for all of these, just redacted here because the info is not needed.)
The MAC making the DHCPREQUEST is: 4C:12:65:xx:yy:62
I finally gave in and configured my DHCP server to allocate it an IP address. It seems to be sitting happy doing absolutely nothing. An nmap scan shows all 65536 ports are closed, so no way to connect in to it at all.
Any idea what this is?
I'm about ready to assign it an IP address the won't work on my network, but I'd really like to figure it out first.