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DNS server documentation update

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Github: OpenVPN/openvpn#937

Change-Id: I53b3f4c60897a1f4dd5efeb6575d525ffb082402
Signed-off-by: Selva Nair <selva.nair@gmail.com>
Acked-by: Frank Lichtenheld <frank@lichtenheld.com>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1646
Message-Id: <20260430163249.13638-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg36816.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit c77d3e90d9)
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Selva Nair 2026-04-30 18:32:43 +02:00 committed by Gert Doering
parent 8e9e91f4ca
commit f50d2e140b
1 changed files with 15 additions and 1 deletions
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16
doc/man-sections/client-options.rst
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@ -216,7 +216,8 @@ configuration.
DNS server options it must be between 0 and 127. The server id is used
to group options and also for ordering the list of configured DNS servers;
lower numbers come first. DNS servers being pushed to a client replace
already configured DNS servers with the same server id.
already configured DNS servers with the same server id. Only the group of
options corresponding to the lowest server id is applied.
The ``address`` option configures the IPv4 and / or IPv6 address(es) of
the DNS server. Up to eight addresses can be specified per DNS server.
@ -249,6 +250,19 @@ configuration.
so that ``--dns`` overrides ``--dhcp-option``. Thus, ``--dns`` can be used today
to migrate from ``--dhcp-option``.
Windows only:
#. If tap-windows6 is in use, dns servers are set by DHCP by default.
In this case only ``--dns search-domains`` and ``--dns server n address ..``
with the lowest value of ``n`` are interpreted. All other ``--dns`` options
are ignored. Use of the dco driver is the recommended way to make use of these
new features.
#. If ``--dns server n resolve-domains`` is in use, the DNS server addresses
corresponding to ``n`` are set on the interface only if ``search-domains`` is
also specified. Otherwise these DNS addresses are used only for NRPT rules for
split-DNS.
--explicit-exit-notify n
In UDP client mode or point-to-point mode, send server/peer an exit
notification if tunnel is restarted or OpenVPN process is exited. In