man: add example of negative trust anchor file

Fixes #17226.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2020-10-11 12:55:10 +02:00
parent 7c50230378
commit 2c91906e25

View file

@ -138,7 +138,17 @@
and follow the same overriding rules. They are text files with the
<filename>.negative</filename> suffix. Empty lines and lines whose first character is
<literal>;</literal> are ignored. Each line specifies one domain name which is the root of a DNS
subtree where validation shall be disabled.</para>
subtree where validation shall be disabled. For example:</para>
<programlisting># Reverse IPv4 mappings
10.in-addr.arpa
16.172.in-addr.arpa
168.192.in-addr.arpa
...
# Some custom domains
prod
stag
</programlisting>
<para>Negative trust anchors are useful to support private DNS
subtrees that are not referenced from the Internet DNS hierarchy,