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Today's Topics:
1. How to remove 'router' option within a dhcpd group block
(Adam Nielsen)
2. Re: How to remove 'router' option within a dhcpd group block
(Sten Carlsen)
----------------------------------------------------------------------
Message: 1
Date: Thu, 30 Jun 2022 23:16:40 +1000
From: Adam Nielsen <a.niel...@shikadi.net>
To: dhcp-users@lists.isc.org
Subject: How to remove 'router' option within a dhcpd group block
Message-ID: <20220630231640.0cbd8...@vorticon.teln.shikadi.net>
Content-Type: text/plain; charset=US-ASCII
Hi all,
Does anyone know if there is a way to remove a router in a group block
that was set in a subnet block, in the dhcpd config file?
subnet 192.168.0.0 netmask 255.255.255.0 {
option routers 1.2.3.4;
}
group {
# Don't supply a router at all.
option routers 0.0.0.0;
host ...
}
Specifying 0.0.0.0 doesn't work, dhcpd still hands out 1.2.3.4 from the
subnet section.
Is there a way to tell it to drop that option completely within the
group section?
My reason for asking is that I have some devices that like to phone
home, and while I can block them at the router it would be nice not to
even have them try to connect to the router at all.
Many thanks,
Adam.
------------------------------
Message: 2
Date: Thu, 30 Jun 2022 16:29:58 +0200
From: Sten Carlsen <st...@s-carlsen.dk>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: How to remove 'router' option within a dhcpd group block
Message-ID: <8035a103-b3dd-4749-9491-58b73b0a3...@s-carlsen.dk>
Content-Type: text/plain; charset=us-ascii
> On 30 Jun 2022, at 15.16, Adam Nielsen <a.niel...@shikadi.net> wrote:
>
> Hi all,
>
> Does anyone know if there is a way to remove a router in a group block
> that was set in a subnet block, in the dhcpd config file?
I put the router option in each pool, probably it will also work in groups.
This works for me.
>
> subnet 192.168.0.0 netmask 255.255.255.0 {
> option routers 1.2.3.4;
> }
>
> group {
> # Don't supply a router at all.
> option routers 0.0.0.0;
>
> host ...
> }
>
> Specifying 0.0.0.0 doesn't work, dhcpd still hands out 1.2.3.4 from the
> subnet section.
>
> Is there a way to tell it to drop that option completely within the
> group section?
>
> My reason for asking is that I have some devices that like to phone
> home, and while I can block them at the router it would be nice not to
> even have them try to connect to the router at all.
>
> Many thanks,
> Adam.
> --
> ISC funds the development of this software with paid support subscriptions.
> Contact us at https://www.isc.org/contact/ for more information.
>
> dhcp-users mailing list
> dhcp-users@lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
------------------------------
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