On 3/31/21 1:55 PM, Lee wrote:
> On 3/31/21, Moritz Kempe <deblist+debian@moke12g.de> wrote:
>> On 3/31/21 1:25 PM, Greg Wooledge wrote:
>>> On Wed, Mar 31, 2021 at 12:14:59AM +0200, Moritz Kempe wrote:
>>>> -- Firefox Hmm. We’re having trouble finding that site. We can’t
>>>> connect to the server at github.com.
>>>> -- Chromium This site can’t be reachedCheck if there is a typo in
>>>> github.com. DNS_PROBE_FINISHED_NXDOMAIN
>>>> moke@rpi4-20201112:~$ host github.com Host github.com not found:
>>>> 2(SERVFAIL)
>>> grep ^hosts: /etc/nsswitch.conf
>> --
>> hosts: files mdns4_minimal [NOTFOUND=return] dns mymachines
> I don't trust multicast dns, so in addition to turning it off I've also got
> $ grep host /etc/nsswitch.conf
> # hosts: files mdns4_minimal [NOTFOUND=return] dns
> hosts: files dns
>
> Maybe worth a shot?
Changed my /etc/nsswitch.conf to
--
..
#hosts: files mdns4_minimal [NOTFOUND=return] dns mymachines
hosts: files dns
..
--
and rebooted the system. The behavior hasn't changed.
github.com is still blocked. And dig is still able to find the ip address.
Or do i have done something wrong?
I have found out, that i can restore some domains when running
"/sbin/dhclient" as root but not all. Github is still not accessible.
That's why I suggested checking for DHCP messages in the logs. But also logs upstream from your pi's. Each time you get a DHCP grant, potentially you've switched DNS servers.
Note: I haven't changed any networking configuration on this device. I
haven't even enabled wifi.