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Servers – Reverse Records

On this pageReverse recordsSetting up reverse recordsFrequently Asked Questions

Tento článek řeší reverzní záznamy pro servery VPS SSD, VPS ON, Dedikované servery a Cloud. Chcete-li nastavit DNS záznamy (vyjma záznamů typu PTR), postupujte podle návodu DNS – Domain Records.

In this article, you will learn:


Reverse records

Reverse records are usually set up mainly for mail servers, because they are used to verify the identity of the sending server. 

The recipient of an email usually performs the following check:

  1. Zjistí si reverzní záznam k IP adrese Vašeho serveru (např. přeloží 46.28.106.11 na  wes1-mx1.wedos.net).
  2. They then resolve the obtained name back to an IP address, i.e. the A record of the relevant domain (wes1-mx1.wedos.net to 46.28.106.11).
  3. Porovná výsledky překladů. Pokud se IP adresa serveru a DNS záznamu shodují, mail zpravidla projde, v opačném případě jej server příjemce může odmítnout.

Příjemce si tímto postupem ověřuje, zda není název v reverzním záznamu podvrhnutý. Do reverzního záznamu si totiž můžete teoreticky napsat jakoukoliv doménu, aniž byste s ní měli něco společného. Opačný překlad toho názvu na IP adresu ale může nastavit jen majitel dané domény.


Setting up reverse records

Changes to reverse records take effect within 1 hour.

Set up reverse records for server and cloud services using these steps:

  1. Log in to the Customer Administration ⧉.
  2. In the top menu, select Server services or Cloud.
  3. Select the service for which you want to set up reverse records.
  4. In the left menu, select IPv4 reverse records or IPv6 reverse records.
  5. Vyberte adresu.
  6. Zadejte odpovídající data záznamu (kompletní doménu nebo subdoménu).
  7. Confirm with the button Insert.

Add IPv4 reverse records to the service:

Add IPv6 reverse records to the service:

Sample IPv6 reverse record setup for the VPS ON service
Sample IPv6 reverse record setup for the VPS ON service

For IPv6, complete the last part of the required IP address and enter the record value.

You can add multiple records to one IP address, one after another.

If you need to edit or delete a reverse record, use the magnifying glass or cross buttons in the reverse records overview.

Icons for the detail and deletion of a reverse record
Icons for the detail and deletion of a reverse record

Frequently Asked Questions

Is it enough to enter only a reverse record to verify a server?

No. In addition to reverse records, also set up the corresponding A and AAAA records.

Where can I enter PTR records?

Instead of PTR records, enter reverse records as described above.

How do I enter a valid IPv6 address?

Servers and Cloud usually have an entire range of IPv6 addresses assigned. However, a reverse record must be in the format of one specific IPv6 address. Set the required address on the server and in DNS, then enter it into the form. The field may start with the character : for example, for an address in the form 2a02:2b88:2:1::1.

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