On Thursday, 31 March 2022 15:36:44 BST Terry Coles wrote:
> I've just remembered that I have the ability to connect with another Kubuntu
> machine (this desktop) by plugging in a USB WiFi Adaptor, that I'd
> forgotten that I have. I did. It worked. So the problem seems to be in my
> laptop. :oops
Hi, I've found out a couple of things since yesterday. First; ip a doesn't
identify the DNS
Server in use and nor does ip route, which only provides the default route.
However, nmcli
does. On my desktop which is connected to the Internet via Ethernet to my home
router
and to the test network via WiFi, I get:
nmcli dev show | grep DNS
IP4.DNS[1]: 192.168.1.1
IP4.DNS[1]: 192.168.0.1
Which shows that the machine has knowledge of a DNS Server via my home router
and
the DNS Server on the test network (the Webserver). I would expect therefore
that
nslookup should work from my desktop to identify items on the test network. The
trouble
is that this only half works. From my desktop:
terry@OptiPlex:~$ nslookup wmt-guest.com
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: wmt-guest.com
Address: 192.168.0.1
Name: wmt-guest.com
Address: 127.0.0.1
Good. But if I try to resolve the identity of one of the other devices on the
real network
(held in a separate file and identified in dnsmasq.conf by the line
'addn-hosts=/etc/
hosts.dnsmasq'), it doesn't work:
terry@OptiPlex:~$ nslookup sumppi
Server: 127.0.0.53
Address: 127.0.0.53#53
** server can't find sumppi: SERVFAIL
Unless I include the identity of the server.
terry@OptiPlex:~$ nslookup sumppi 192.168.0.1
Server: 192.168.0.1
Address: 192.168.0.1#53
Name: sumppi
Address: 192.168.0.2
I can resolve sumppi when logged into the Webserver via ssh. So why does
nslookup fail
when I try to use it from a device logged into the test network unless I
include the identity
of the DNS Server?
--
Terry Coles
--
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