Re: Temporary failure in name resolution

["Alexander V. Makartsev" <avbetev@gmail.com>]

On 03.04.2021 01:15, rhkramer@gmail.com wrote:

> Sort of building on this question, and just trying to educate myself, if the 
> DSL modem had a caching nameserver:
>
>    1) would your computer need to specify the IP of that modem (presumably) 
> 192.168.1.254 to take advantage of the caching?
>     
    Most of SOHO class routers\modems don't offer fully-fledged DNS
    server and domain name caching features.
    They act as relays, simply redirecting DNS requests to the nearest
    configured domain name server.
    But if some device offers such features like domain name caching,
    then yes, you will have to specify the IP of that device to take
    advantage of the caching.
    
>    2) would the caching feature be bypassed if your computer used the public 
> DNS name servers (e.g., 8.8.8.8, 8.8.4.4, and 1.1.1.1)?  (Or if they were 
> listed before the modem IP address?)
>
>     
    Yes, it would be bypassed since you asking completely different
    domain name server to resolve your DNS requests.
    
    An example: If you have a local network with a several hosts and
    want to address these hosts by their domain names,
    you will have to setup local domain name server which will resolve
    local domain name requests and redirect non-local domain ones. 
    In this case, you will have to specify only one IP address of that
    local DNS, because public domain name servers don't know anything
    about host names in your local domain.
    
-- 
With kindest regards, Alexander.

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