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doc: clarify the behavior of unopenable listen_addresses

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Reported-by: Gurjeet Singh

Discussion: https://postgr.es/m/CABwTF4WYPD9ov-kcSq1+J+ZJ5wYDQLXquY6Lu2cvb-Y7pTpSGA@mail.gmail.com

Backpatch-through: 11
This commit is contained in:
Bruce Momjian
2023-09-26 19:02:18 -04:00
parent 29dec9f043
commit cf93f173c1
1 changed files with 7 additions and 2 deletions
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9
doc/src/sgml/config.sgml
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@@ -656,10 +656,15 @@ include_dir 'conf.d'
<literal>::</literal> allows listening for all IPv6 addresses.
If the list is empty, the server does not listen on any IP interface
at all, in which case only Unix-domain sockets can be used to connect
to it.
to it. If the list is not empty, the server will start if it
can listen on at least one TCP/IP address. A warning will be
emitted for any TCP/IP address which cannot be opened.
The default value is <systemitem class="systemname">localhost</systemitem>,
which allows only local TCP/IP <quote>loopback</quote> connections to be
made. While client authentication (<xref
made.
</para>
<para>
While client authentication (<xref
linkend="client-authentication"/>) allows fine-grained control
over who can access the server, <varname>listen_addresses</varname>
controls which interfaces accept connection attempts, which