Search domain changed to cable.virginm.net

Question

In the early hours of Apr 14 2025 the search domain of my Pi changed from raspberrypi to raspberrypi.cable.virginm.netThis seems a bit odd because I was asleep at this time and of course "cable.virginm.net" is an external host name, not like ".home"/".local"pi@raspberrypi ~ $ cat /etc/resolv.conf                                                                                                                                                                                           [21:50]
# Generated by resolvconf
domain cable.virginm.net
nameserver 127.0.0.1Closest I can find via search is Local DNS suffix is now cable.virginm.net | Virgin Media Community - 5507800I know this is a bit vague and there's not much I can find in logs for this, but why would the Virgin router be giving out this search domain? It is in router mode and always has been.Hub 5 device information
The information below shows current status of this Hub 5.

Standard specification compliant	:	DOCSIS 3.1
Hardware version	:	1.2
Software version	:	LG-RDK_7.6.20-2306.5&nbsp;

Client62 · Answer

but why would the Virgin router be giving out this search domain&nbsp;In modem mode a VM Hub is transparent.Focus on your 3rd Party Router's behaviour.&nbsp;&nbsp;

1337Hax0r · Answer

Thanks for your reply. As I mentioned it is in router mode and always has been.

1337Hax0r · Answer

Nice spot - yes it was my Pi-Hole server, but I've moved that to a VM now so it is no longer used as a DNS server, and I've stopped some of the services to that affect.However, dnsmasq is still installed and active, hence the 127.0.0.1 resolver.I did initially configure the Pi as a DHCP lease on the VM router, but for the Pi-Hole setup, I set an IP in /etc/dhcpcd.confinform ip_address=192.168.0.50/24As you say, it doesn't really affect things. More of a curiosity of why this should happen out of the blue.

Roger_Gooner · Answer

One possibility is that the hub's DHCP server sent a new search domain in the DHCP lease for some networking or DNS reason. As a workaround, with the caveat that I'm no Pi user, set the Pi a static IP adress outside your hub’s DHCP range and define the DNS and search domain manually in your .conf file.

1337Hax0r · Answer

Thanks.It's causing no issue atm as I already have static for that. I'm just curious to why it suddenly did it. Seems like a bug or misconfiguration to me, DHCP shouldn't randomly change the search domain.

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Search domain changed to cable.virginm.net

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