Re: Checking internet connection without a winbox

Tim:
When that happens, does it keep on trying the first one first, or carry
on using the one that responded quickest? I seemed to notice the latter
behaviour.

For instance, I have my own caching name server, with local machine
addresses in it as well. I also have a router with its own, non
configurable, DNS server. I had my computers set to use my name server
first, and the router second. But found that local machines weren't
being resolved, the computers were using the router's name server (which
happens to respond quicker).

Les Mikesell:
I think when you run your own caching nameserver with forwarders
set, named will use the fastest forwarder as well as cache
the answers.

In my case, I don't have any forwarders set. I see little point in
running my own name server (which I began doing because of my ISP's
crappy ones), if I simply get it to forward request to the ISP's crappy
servers, instead of acting *as* a DNS server. :-\

When you use the resolver library against remote nameservers it
doesn't remember much of anything although individual applications
might.

Though individual applications get the system to resolve addresses for
them, they don't read the /etc/resolv.conf file and then run their own
DNS resolving routines on the DNS server addresses that they find listed
in there. With an exception or two (e.g. Squid generally resolves
addresses on its lonesome).

I'd noticed that Windows does seem to carry on using whichever
nameserver last answered, before switching over to the other if there
was a problem. Then, if that happens, it keeps on using the last one
that responded. I wondered if Linux played the same trick.

Neither OS appears to use both of them all the time (spreading the
load), which I can think of as another way to make good use of having
several name servers at your disposal.

--
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