In order to add a PTR
, or Reverse DNS
record for your instance's IP Address, you need to follow the steps outlined below:
...
then selecting `Server Details'.In the Settings
Section, you will find two tabs: IPv4 and IPv6.
All your IPv4 Addresses are displayed in one single table. There is a column titled Reverse DNS
, in this column there is an icon that looks like a Pencil. Click this icon to edit the PTR/Reverse DNS value for the IP Address. Once done, click the blue Update
Button.
If you have secondary IPv4 Addresses, a Delete
icon will be showing next to the Edit
icon.
The process of creating Reverse DNS for IPv6 Addresses is slightly different than that for IPv4.
Each Vultr instance is assigned a /64 IPv6 Subnet. When you click on the IPv6
tab, you will see multiple sections.
This section has a table that shows the current IPv6 Network Assignment. The Network
column is the one that contains the IPv6 Subnet assigned to the instance being managed.
In that section, there are two text fields. The first one is for adding the IPv6 Address, and the second one is for the Reverse DNS value.
Example:
If you are assigned 2001:2001:1:225::/64
, you can find your usable IP range using several tools, sipcalc
, a command-line tool for Linux is one of them. Alternatively, you can use Vultr's IPv6 Subnet Calculator.
$ sipcalc 2001:2001:1:225::/64
-[ipv6 : 2001:2001:1:225::/64] - 0
[IPV6 INFO]
Expanded Address - 2001:2001:0001:0225:0000:0000:0000:0000
Compressed address - 2001:2001:1:225::
Subnet prefix (masked) - 2001:2001:1:225:0:0:0:0/64
Address ID (masked) - 0:0:0:0:0:0:0:0/64
Prefix address - ffff:ffff:ffff:ffff:0:0:0:0
Prefix length - 64
Address type - Aggregatable Global Unicast Addresses
Network range - 2001:2001:0001:0225:0000:0000:0000:0000 -
2001:2001:0001:0225:ffff:ffff:ffff:ffff
In the IP
Section, you would pick an IP Address to use, for example, 2001:2001:0001:0225::2
. So you would input that IP in its respective section, then add your value/hostname in the Reverse DNS
section, then click the blue Add
Button.
Once you have one or more Reverse DNS records, the Reverse DNS
section will be showing a table that lists all your records. You can edit or delete them at your convenience.
Vultr offers an API endpoint to manage reverse DNS.
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