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Add instructions about creating a AAAA record

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Jeremy Fleischman 2024-12-16 17:35:11 +00:00 committed by lewo
parent e4aabd3de6
commit 6db6c0dc72
1 changed files with 19 additions and 8 deletions
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docs/setup-guide.rst
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@ -20,25 +20,30 @@ an up and running mail server. Once the server is deployed, we could
then set all DNS entries required to send and receive mails on this
server.
Setup DNS A record for server
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Setup DNS A/AAAA records for server
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Add a DNS record to the domain ``example.com`` with the following
Add DNS records to the domain ``example.com`` with the following
entries
==================== ===== ==== =============
Name (Subdomain) TTL Type Value
==================== ===== ==== =============
``mail.example.com`` 10800 A ``1.2.3.4``
``mail.example.com`` 10800 AAAA ``2001::1``
==================== ===== ==== =============
If your server does not have an IPv6 address, you must skip the `AAAA` record.
You can check this with
::
$ ping mail.example.com
64 bytes from mail.example.com (1.2.3.4): icmp_seq=1 ttl=46 time=21.3 ms
...
$ nix-shell -p bind --command "host -t A mail.example.com"
mail.example.com has address 1.2.3.4
$ nix-shell -p bind --command "host -t AAAA mail.example.com"
mail.example.com has address 2001::1
Note that it can take a while until a DNS entry is propagated. This
DNS entry is required for the Let's Encrypt certificate generation
@ -98,8 +103,11 @@ Set rDNS (reverse DNS) entry for server
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Wherever you have rented your server, you should be able to set reverse
DNS entries for the IP’s you own. Add an entry resolving ``1.2.3.4``
to ``mail.example.com``.
DNS entries for the IP’s you own:
- Add an entry resolving IPv4 address ``1.2.3.4`` to ``mail.example.com``.
- Add an entry resolving IPv6 ``2001::1`` to ``mail.example.com``. Again, this
must be skipped if your server does not have an IPv6 address.
.. warning::
@ -115,6 +123,9 @@ You can check this with
$ nix-shell -p bind --command "host 1.2.3.4"
4.3.2.1.in-addr.arpa domain name pointer mail.example.com.
$ nix-shell -p bind --command "host 2001::1"
1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.2.ip6.arpa domain name pointer mail.example.com.
Note that it can take a while until a DNS entry is propagated.
Set a ``MX`` record