Strange issue with name resolution systemd-resolved.service - Network Name Resolution

[Michael D. Setzer II]

Currently in Nevada accessing 4 of my computers back in Guam.
Has been working fine, until earlier today.

VNC into the machines using same name of router, but different 
ports mapped to machines.

Generally login to each one, and then next with no problem.
But today, got error messages that couldn't resolve names. 
then tried dig on name and got similar timeout problem with it.

Tried restarting service, and that would work for a while, but then 
it would give error again.

IP is a dyndns.org address, so it can change, but very seldom.
Added the address to /etc/hosts and then problem went away 
completely.  Connections made with no problem. Works, unless IP 
changes. 

Don't know if something was changed with service recently, or if 
their is some way to have it have a backup if the 127.0.0.53 isn't 
working? Just says timedout? 

Any options to optimize things to prevent this? Have also seen a 
similare issue running dnf updates. Sometimes it reports that it 
can't resolve names of repos? 

Note: Cox is ISP where I'm located, so don't know. The speed is 
good, getting 175+M down, and about 11M up. 

Long ago use to use multiple name servers including 8.8.8.8, but 
then at somepoint it changed to the 127.0.0.53 thing.

Thanks.

+------------------------------------------------------------+
 Michael D. Setzer II - Computer Science Instructor (Retired)     
 mailto:[e-mail]                            
 mailto:[e-mail]
 mailto:[e-mail]
 Guam - Where America's Day Begins                        
 G4L Disk Imaging Project maintainer 
 http://sourceforge.net/projects/g4l/
+------------------------------------------------------------+

[Barry]

>  On 8 Mar 2024, at 07:39, Michael D. Setzer II via users
> <users(a)lists.fedoraproject.org&gt; wrote:
>  
>  Long ago use to use multiple name servers including 8.8.8.8, but
>  then at somepoint it changed to the 127.0.0.53 thing. 
That means that systemd-resolved is being used.
Have you configured systemd-resolved?
That is where you would set to use 8.8.8.8 for example.

You can check what is setup and do test queries with the resolvectl tool.

Barry