[wplug] The history of DNS.... Resolvers

[Terence Golightly]

Hiya Drew,

my nsswitch.conf looks like this:

 cat /etc/nsswitch.conf
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd:         compat
group:          compat
shadow:         compat
gshadow:        files

hosts:          files mdns4_minimal [NOTFOUND=return] dns myhostname
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis

I've been playing around with configurations and I might have some overkill
here.  I don't need a dhcp server and I didn't realize that network manager
and systemd-resolver use a dnsmasq stub to resolve local host names except
it wasn't originally working.  So I had decided to install dnsmasq and set
it up to be the resolver and so far so good.  Just realize its overkill.
Will play around when time permits.

Terry

On Tue, Aug 15, 2017 at 10:25 AM, Drew from Zhrodague <
drewzhrodague at zhrodague.net> wrote:

>         I haven't worked with dnsmasq much, but name resolution is
> directed by /etc/nsswitch.conf, which will list which order the various
> name-resolution bits should be used. Mine at home says this:
>
> hosts:     db files nisplus nis dns
>
>         'files' is the entry that will use /etc/hosts, and I believe 'dns'
> will use /etc/resolv.conf.
>
>
>                 Nice to see some traffic on the list!
>
>
>
> I was recently having problems with my DNS resolving and cn open a web page
>> but I could ping any ip address.  This happened after removing the cludgy
>> multiboot software.  It left behind "tailings" I'd like to call them.  It
>> took me a little time to figure out  that qemu had left behind some
>> virtual
>> interfaces.  After I removed them, I regained some connectivity.  However,
>> my host name was not resolving.  Apparently, systemd could not resolve any
>> dns servers and was not seeing my modem's hostname.home.  So when time
>> allowed, Okay, it was pretty obvious that my rig's DNS resolver was not
>> configured correctly Duh.  So I began a sojourn, looking to resolvers.
>>   through my travails, I installed dnsmasq and disabled sustemd-network.
>> Added Open DNS servers to my fios modem, /var/run/NetworkManager/resolv
>> .conf,
>> the requisite resolv.conf for dnsmasq and restarted.  Wahla!.  That brings
>> me to my question,  How many resolvers are there for linux and how do they
>> play/not play together.  I noticed from posts online that users depending
>> on their needs us network-manager or dnsmasq or dns-sd (old an apple
>> program?)  I'm curious,  anybody?  I'm currently running Linux Mint 18.1
>> on
>> my desktop.
>>
>
>
> --
>
> Drew from Zhrodague
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