Add a DNS section to charybdis-oper-guide.

This commit is contained in:
Jilles Tjoelker 2008-07-10 23:31:46 +02:00
parent 60817ff45c
commit 40a53c07b4
1 changed files with 22 additions and 2 deletions

View File

@ -549,8 +549,6 @@ connect "<replaceable>name</replaceable>" {
<listitem>
<para>The hostname or IP to connect to.</para>
<note><para>
Charybdis uses solely DNS for all hostname/address lookups
(no <filename>/etc/hosts</filename> or anything else).
Furthermore, if a hostname is used, it must have an A or AAAA
record (no CNAME) and it must be the primary
hostname for inbound connections to work.
@ -1094,6 +1092,28 @@ service {
</variablelist>
</sect2>
</sect1>
<sect1>
<title>Hostname resolution (DNS)</title>
<para>
Charybdis uses solely DNS for all hostname/address lookups
(no <filename>/etc/hosts</filename> or anything else).
The DNS servers are taken from <filename>/etc/resolv.conf</filename>.
If this file does not exist or no valid IP addresses are listed in it,
the local host (127.0.0.1) is used. (Note that the latter part
did not work in older versions of Charybdis.)
</para>
<para>
IPv4 as well as IPv6 DNS servers are supported, but it is not
possible to use both IPv4 and IPv6 in
<filename>/etc/resolv.conf</filename>.
</para>
<para>
For both security and performance reasons, it is recommended
that a caching nameserver such as BIND be run on the same machine
as Charybdis and that <filename>/etc/resolv.conf</filename> only
list 127.0.0.1.
</para>
</sect1>
</chapter>
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