[Dnsmasq-discuss] Dynamic address config?

[Feng Shao]

Thanks Geert,



On Wed, Nov 23, 2022 at 5:28 PM Geert Stappers via Dnsmasq-discuss <
dnsmasq-discuss at lists.thekelleys.org.uk> wrote:

> On Wed, Nov 23, 2022 at 01:47:27PM +0800, Feng Shao wrote:
> > There are a bunch of machines in our lab, and we normally don't have DNS
> > records configured for them, only accessing by IP. In order to ssh to
> them
> > with key auth, I have a config in my .ssh/config like
> >
> > Host *.mylab
> >   User root
> >   IdentityFile ~/.ssh/id_rsa.work
> >
> > and I have some "address=/123.123.123.123.mylab/123.123.123.123" line in
> > dnsmasq.conf. The problem here is I need to add an entry whenever a new
> IP
> > comes.
>
> So share with us a more representive sample set of such entries.
>
In dnsmasq.conf, I have lines like:
address=/123.123.123.123.mylab/123.123.123.123
address=/123.123.123.12 <http://123.123.123.123/>4.mylab/123.123.123.12
<http://123.123.123.123/>4
address=/123.123.123.12 <http://123.123.123.123/>5.mylab/123.123.123.12
<http://123.123.123.123/>5
address=/123.123.123.12 <http://123.123.123.123/>6.mylab/123.123.123.12
<http://123.123.123.123/>6

>
>
> > Can this configuration be dynamically? For example,
> > "address=/*.mylab/somecmd %1", where "somecmd" is a external command and
> %1
> > will be replaced by the name in A/AAAA request. So that for any DNS
> request
> > to *.mylab, dnsmasq invoke this external command and pass the name as
> > argument, the output of external command, which will be interpreted as
> > IPv4/IPv6 addr then responsed to client?
>
> Advice:  Use an open question to start a discussion.
>
The requirement is I want to ssh any host in my lab without password, I am
open to any other solution.

>
>
>
> Groeten
> Geert Stappers
>
>
> P.S.
> Welcome to dnsmasq mailinglist
> --
> Silence is hard to parse
>
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