I have a DNS server 10.0.0.2, and /etc/resolv.conf includes the line
I have a wireless AP, MAIN, which works fine.
If I connect to Trendnet 410AP ethernet over powerline AP, APPENDAGE,
DNS fails. /etc/resolv.conf is unchanged. host -v returns:
Host www.bbc.co.uk not found: 2(SERVFAIL)
Received 31 bytes from 10.0.0.2#53 in 2335 ms
However, I can log in to 10.0.0.2 while connected to APPENDAGE, so it
doesn't look like a physical connectivity problem. And if I run host on
10.0.0.2 it succeeds.
I have browsed to APPENDAGE but, as a mere AP, it doesn't provide any
I have run journalctl -f on 10.0.0.2. When I request a servername that
doesn't exist, I get "NAMED... REFUSED", whether I'm connected via MAIN
or APPENDAGE. The implication is that APPENDAGE is eating responses on
port 53, which looks like a hardware or firmware failure. I can't think
of any reason why 10.0.0.2 would refuse requests.