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man: document _outbound

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Lennart Poettering 2021-03-26 18:40:52 +01:00
parent ee18f107d3
commit 2f166bb79b
3 changed files with 19 additions and 5 deletions
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7
man/nss-myhostname.xml
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@ -51,6 +51,13 @@
ordered by their metric. This assigns a stable hostname to the
current gateway, useful for referencing it independently of the
current network configuration state.</para></listitem>
<listitem><para>The hostname <literal>_outbound</literal> is resolved to the local IPv4 and IPv6
addresses that are most likely used for communication with other hosts. This is determined by
requesting a routing decision to the configured default gateways from the kernel and then using the
local IP addresses selected by this decision. This hostname is only available if there is at least one
local default gateway configured. This assigns a stable hostname to the local outbound IP addresses,
useful for referencing them independently of the current network configuration state.</para></listitem>
</itemizedlist>
<para>Various software relies on an always-resolvable local

10
man/resolvectl.xml
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@ -299,11 +299,11 @@
<listitem><para>Takes a boolean parameter; used in conjunction with <command>query</command>. If true
(the default), select domains are resolved on the local system, among them
<literal>localhost</literal> and <literal>_gateway</literal> or entries from
<filename>/etc/hosts</filename>. If false these domains are not resolved locally, and either fail (in
case of <literal>localhost</literal> or <literal>_gateway</literal> and suchlike) or go to the
network via regular DNS/mDNS/LLMNR lookups (in case of <filename>/etc/hosts</filename>
entries).</para></listitem>
<literal>localhost</literal>, <literal>_gateway</literal> and <literal>_outbound</literal>, or
entries from <filename>/etc/hosts</filename>. If false these domains are not resolved locally, and
either fail (in case of <literal>localhost</literal>, <literal>_gateway</literal> or
<literal>_outbound</literal> and suchlike) or go to the network via regular DNS/mDNS/LLMNR lookups
(in case of <filename>/etc/hosts</filename> entries).</para></listitem>
</varlistentry>
<varlistentry>

7
man/systemd-resolved.service.xml
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@ -104,6 +104,13 @@
gateway addresses, ordered by their metric. This assigns a stable hostname to the current gateway,
useful for referencing it independently of the current network configuration state.</para></listitem>
<listitem><para>The hostname <literal>_outbound</literal> is resolved to the local IPv4 and IPv6
addresses that are most likely used for communication with other hosts. This is determined by
requesting a routing decision to the configured default gateways from the kernel and then using the
local IP addresses selected by this decision. This hostname is only available if there is at least one
local default gateway configured. This assigns a stable hostname to the local outbound IP addresses,
useful for referencing them independently of the current network configuration state.</para></listitem>
<listitem><para>The mappings defined in <filename>/etc/hosts</filename> are resolved to their
configured addresses and back, but they will not affect lookups for non-address types (like MX).
Support for <filename>/etc/hosts</filename> may be disabled with <varname>ReadEtcHosts=no</varname>,