Re: searching for hosts in domain local

[Dan Hitt <dan.hitt@gmail.com>]

Hi David,

Thanks for your responses.

I'm going to try to your questions and points all in this one post
so it's easier to comprehend.

Regarding the 'local' name, i don't know how it came into being
(or whether it was deliberate on anybody's part).  I sure don't
think i created it.

Thanks for pointing out /var/lib/dhcp/, and thanks very much for
pointing out netstat.

My /etc/services is like yours regarding mdns (no surprise there
i guess), and also like yours regarding what netstat reveals:
udp and udp6 for 5353 so something is trying to use that port.

I've subsequently set up ~/.ssh/config so i can ssh to all my
machines without '.local'.  I don't ping too much, so that's not
a problem (but it is a little unsatisfactory).

And --- i was wrong about how i have my network laid out.

So if anybody stumbles on this thread with a similar problem:

The router just connects directly to my main linux machine,
and the other three hosts (one linux, two other)
are all on a subnet that does not include the router.

So their behavior is much more plausible --- they don't
need '.local' at all --- the only machine that seems to need
'.local' is my main linux machine, but it has two network
interfaces, so it's in a unique situation.

(And that's why i don't want to be too emphatic about
'local' --- i sure don't think i chose that word, but because
i was wrong about describing my network earlier, maybe
i did something else and just don't recall it.  For example,
if 'local' was a drop down in one of the guis i went through,
then that might be the origin.  And i'm very sorry for
leaving a trail of red herrings if so!!! :( )

dan




On Sun, Apr 17, 2016 at 1:37 PM, David Wright <deblis@lionunicorn.co.uk> wrote:
> On Sun 17 Apr 2016 at 09:42:38 (-0700), Dan Hitt wrote:
>> If there's a way to determine if i'm running mDNS on my main linux
>> machine i'm certainly interested, but i don't want to be too greedy about this.
>> Because, after all, maybe it is reasonable that if my main linux
>> machine is sending all these packets around it needs more help
>> in determining what's on the local network.
>
> $ grep -i mdns /etc/services
> mdns            5353/tcp                        # Multicast DNS
> mdns            5353/udp
> $ netstat -n -a -e | grep 5353
> udp        0      0 0.0.0.0:5353        0.0.0.0:*     103        14857
> udp6       0      0 :::5353             :::*          103        14858
> $
>
> Cheers,
> David.
>