Re: [Dnsmasq-discuss] dhcp-host match based on set of tags

[Kincl, Jason C.]

Hi Peter,

We discussed a solution and Simon said it was good but it has not yet been 
implemented.

https://www.mail-archive.com/dnsmasq-discuss%40lists.thekelleys.org.uk/msg09297.html

Simon, with 2.75 out the door already, is this something we could revisit?


Thanks,

-- 
Jason Kincl
HPC Systems Administrator
National Center for Computational Sciences
Oak Ridge National Laboratory








From:  Dnsmasq-discuss on behalf of Peter Holmberg
Date:  Friday, August 21, 2015 at 3:51 AM
To:  "dnsmasq-discuss@lists.thekelleys.org.uk"
Subject:  Re: [Dnsmasq-discuss] dhcp-host match based on set of tags


Hi!

I know this is an old post but 

i try to solve a similar problem as this. 
And wonder if you solved it? 

And in that case how?


/Peter

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Re: [Dnsmasq-discuss] strict-order backwards in Debian 7 dnsmasq 2.72-3 (vs dnsmasq 2.59)?

[Tim Wright]

On Tue, Sep 1, 2015 at 11:13 AM, Albert ARIBAUD 
wrote:

> Hi Tim,
>
> Le Tue, 1 Sep 2015 10:00:36 -0700, Tim Wright  a
> écrit :
>
> > Hello,
> > I apologize if this is something known, or if I'm doing something silly,
> > but I switched over from Ubuntu 12.04LTS (dnsmasq 2.59) to Debian 7
> stable
> > (dnsmasq 2.72-3) and I'm seeing something odd. I have "strict order"
> > enabled, and many lines in /etc/dnsmasq.conf of the form:
> >
> > server=/example.domain.com/
> > server=/example.domain.com/
> > server=/example.domain.com/
> > server=/example.domain.com/
> > server=/example.domain.com/8.8.8.8
> >
> > The reason for this is that there are a number of names where "
> > example.domain.com" returns a different, internal IP address when
> connected
> > to the corporate network (vpn), but I want to fail back to the external
> if
> > the vpn is down etc.
> >
> > In version 2.59, this worked perfectly. In the newer version, it appears
> to
> > be completely backwards. I reversed the entire config file so that
> entries
> > are now of the form:
> >
> > server=/example.domain.com/8.8.8.8
> > server=/example.domain.com/
> > server=/example.domain.com/
> > server=/example.domain.com/
> > server=/example.domain.com/
> >
> > but I was curious if this is expected behaviour or whether it would be
> > considered a bug.
>
> Hmm... From the dnsmasq man page, --strict-order is about following the
> order in which upstream DNS servers appear in /etc/resolv.conf, not in
> /etc/dnsmasq.conf.
>

Hi Albert,
I'm not sure that it's that clear. At least for 2.73, the man page is
conflicted:

   -o, --strict-order
  By default, dnsmasq will send queries to  any  of  the
 upstream
  servers  it  knows  about  and  tries to favour servers that
are
  known to be up. Setting this flag forces  dnsmasq  to  try
 each
  query  with  each  server  strictly  in the order they appear
in
  /etc/resolv.conf

The first part clearly states that by default it will query "any of the
upstream servers it knows about". If you use lines of the form "server=" in
the config file, that's a lot more than what you might find in
/etc/resolv.conf. Furthermore, that certainly isn't how it works. With
"strict-order" enabled, it certainly applies to servers defined in the
config file. The issue is that at some point, it applied in forward order,
and now, it appears to apply in reverse order.

Looking at the code, servers from /etc/resolv.conf are not treated
especially compared to those from the config file - they all end up in the
daemon->servers list.

Regards,

Tim
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[Dnsmasq-discuss] try to split dcp ranges into known and unknown devices

[Stefan Priebe - Profihost AG]

Hi,

i'm trying to split my devices into specific ip ranges and give all
unknown devices another range.

But it doesn't work like i expected.

devices_unknown.conf:
-
dhcp-option=tag:unknown_gw,3,10.0.255.1

dhcp-range=net:#known,set:unknown_gw,10.0.255.10,10.0.255.250,5m
-

devices_ipmi.conf:
-
dhcp-mac=ipmi,0c:c4:7a:*:*:*
dhcp-mac=ipmi,00:25:90:*:*:*

dhcp-option=tag:ipmi_gw,3,10.0.32.1

# set dhcp range
dhcp-range=net:ipmi,set:ipmi_gw,10.0.32.10,10.0.47.250,60m
-


devices_server.conf:
-
dhcp-mac=server,0c:aa:aa:aa:*:*

dhcp-option=tag:server_gw,3,10.0.16.1

dhcp-range=net:server,set:server_gw,10.0.16.10,10.0.31.250,60m
-

But when i install new ipmi or server devices it still get's an IP from
the unknown range.

Stefan

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[Dnsmasq-discuss] different name resolution per host

[Yan Seiner]

I am trying to set up a single host on my network that would have 
different name resolution for a particular domain from the rest of the 
hosts.


As an example, the name www.example.com would normally be handed over 
to, let's say, google's servers for name resolution. but for one host on 
my network I want it to always resolve to a specific address, so


If request comes in from client a.my.net, return 1.2.3.4
If request comes in from any other client on a.my.net, return the answer 
that google's servers provide


The problem I am trying to solve is that the domain names I am dealing 
with resolve to multiple IPs, and this particular box needs to connect 
to one specific server, not round-robin.  And it's an appliance and I 
can't change any of the network parameters; everything has to be handled 
through the DNS server.


Does this make any sense at all?

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