David, another thing, I use both IPv4 and IP6 in my Cloudflare DNS-TLS config 
...
--
2606:4700:4700::1111~cloudflare-dns.com
1.1.1.1~cloudflare-dns.com
--

That should add some resilience to upstream network routing issues.

Lonnie



> On Apr 8, 2020, at 7:39 PM, Lonnie Abelbeck <li...@lonnie.abelbeck.com> wrote:
> 
> Hi David,
> 
> Just so happened I had a very short outage here as well, just long enough for 
> failover to kick in.
> 
> No problem with DNS-TLS DNS.
> 
> Possibly your outage had some issue with upstream routes as well.
> 
> Lonnie
> 
> 
> 
>> On Apr 8, 2020, at 2:52 PM, Lonnie Abelbeck <li...@lonnie.abelbeck.com> 
>> wrote:
>> 
>> Hi David,
>> 
>> That should work as expected.
>> 
>> The DNS-TLS (stubby) should timeout and retry after a short period of time.
>> 
>> I vaguely recall testing this, and it did take a little while for DNS to 
>> work again, but it worked, IIRC.
>> 
>> Lonnie
>> 
>> 
>>> On Apr 8, 2020, at 1:46 PM, David Kerr <da...@kerr.net> wrote:
>>> 
>>> Yesterday Comcast/Xfinity went down for a few minutes and my Astlinux did a 
>>> failover to my cellular link.  However it looks like my DNS did not survive 
>>> the failover... name resolution did not work after the primary link was 
>>> restored (and possibly was not working when on the secondary during 
>>> failover, but as I'm not so sure about that).  I have DNS-TLS configured 
>>> with 1.1.1.1. 
>>> 
>>> Any ideas?  Is DNS-TLS expected to survive a change in interface/IP 
>>> address?  I tried a restart of DNS-TLS after the primary link was restored 
>>> but that did not seem to work... so I rebooted Astlinux (too many people in 
>>> the house now-a-days for me to spend any time troubleshooting on everyone's 
>>> primary internet connection!).
>>> 
>>> Thoughts?
>>> David
>>> 
>>> 
>>> _______________________________________________
>>> Astlinux-users mailing list
>>> Astlinux-users@lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/astlinux-users
>>> 
>>> Donations to support AstLinux are graciously accepted via PayPal to 
>>> pay...@krisk.org.
>> 
>> 
>> 
>> _______________________________________________
>> Astlinux-users mailing list
>> Astlinux-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/astlinux-users
>> 
>> Donations to support AstLinux are graciously accepted via PayPal to 
>> pay...@krisk.org.
>> 
>> 
> 
> 
> 
> _______________________________________________
> Astlinux-users mailing list
> Astlinux-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/astlinux-users
> 
> Donations to support AstLinux are graciously accepted via PayPal to 
> pay...@krisk.org.
> 
> 



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