Re: IPv6 Marches On

From	Theo <theom+news@chiark.greenend.org.uk>
Newsgroups	comp.misc
Subject	Re: IPv6 Marches On
Date	2026-04-25 11:47 +0100
Organization	University of Cambridge, England
Message-ID	<jjD*PBYEA@news.chiark.greenend.org.uk> (permalink)
References	(1 earlier) <n4t2fmFnurmU1@mid.individual.net> <20260423204541@news.eternal-september.org> <10sfc0j$3ladb$1@dont-email.me> <10sgdgu$9k53$2@dont-email.me> <10shvqk$mefs$1@dont-email.me>

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SH <i.love@spam.com> wrote:
> So How do I force or redirect *every* device that conencts to my network 
> to use MY own 2 DNS rather than wandering off and using an external DNS 
> like Google's own DNS?

Block the IPs of external DNS servers.

If a device decides to DIY its own DNS (or DoH or DoT), there's nothing you
can do to stop it - no setting in DHCPv4, DHCPv6, RAs is going to prevent
it.  Only if it can't reach the external servers might it fall back to what
it's been told in local config.

Theo

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IPv6 Marches On Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-17 00:32 +0000
  Re: IPv6 Marches On Marco Moock <mm@dorfdsl.de> - 2026-04-17 20:27 +0200
  Re: IPv6 Marches On Adrian Caspersz <email@here.invalid> - 2026-04-23 00:04 +0100
    Re: IPv6 Marches On Marco Moock <mm@dorfdsl.de> - 2026-04-23 16:16 +0200
    Re: IPv6 Marches On Roger Blake <rogblake@iname.invalid> - 2026-04-24 00:51 +0000
      Re: IPv6 Marches On SH <i.love@spam.com> - 2026-04-24 10:09 +0100
        Re: IPv6 Marches On Ian <${send-direct-email-to-news1021-at-jusme-dot-com-if-you-must}@jusme.com> - 2026-04-24 11:17 +0000
          Re: IPv6 Marches On Marco Moock <mm@dorfdsl.de> - 2026-04-24 20:40 +0200
          Re: IPv6 Marches On Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-24 22:57 +0000
        Re: IPv6 Marches On Marco Moock <mm@dorfdsl.de> - 2026-04-24 20:41 +0200
          Re: IPv6 Marches On SH <i.love@spam.com> - 2026-04-25 10:00 +0100
            Re: IPv6 Marches On Theo <theom+news@chiark.greenend.org.uk> - 2026-04-25 11:47 +0100
            Re: IPv6 Marches On kludge@panix.com (Scott Dorsey) - 2026-04-25 07:13 -0400
              Re: IPv6 Marches On Theo <theom+news@chiark.greenend.org.uk> - 2026-04-25 14:48 +0100

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