---
title: "Configuring Resource Records"
canonical: "https://docs.infoblox.com/space/BloxOneDDI/186648422/Configuring%20Resource%20Records"
format: markdown
---
<span style="color: #000000">DNS resource records provide information about objects and NIOS-X Servers. DNS servers use these records to respond to queries for NIOS-X Servers and objects.</span>

<span style="color: #000000">You can perform the following actions:</span>

> Macro (children)

<span style="color: #000000">The following table describes the DNS record sources in Universal DDI, including combined sources.</span>

| **Record Source** | **Description** | **Record Types** |
| --- | --- | --- |
| <span style="color: #3e3f40">Static</span> | <span style="color: #3e3f40">Record created manually in UI or by an API call.</span> | <span style="color: #3e3f40">All record types except SOA.</span> |
| <span style="color: #3e3f40">Dynamic</span> | <span style="color: #3e3f40">Record created automatically by a dynamic DNS update.</span> | <span style="color: #3e3f40">All record types except SOA.</span> |
| <span style="color: #3e3f40">System</span> | <span style="color: #3e3f40">Record created automatically upon name server assignment or zone creation event.</span> | <span style="color: #3e3f40">A, PTR, NS, SOA.</span> |
| <span style="color: #3e3f40">Static, System</span> | <span style="color: #3e3f40">A case when a record was created manually, and then, at some point, the zone was assigned to a name server, which resulted in the creation of a System record. </span> | <span style="color: #3e3f40">A, PTR, NS, SOA.</span> |
| <span style="color: #3e3f40">Dynamic, System</span> | <span style="color: #3e3f40">Record created through a dynamic DNS update, after which the zone was assigned to a name server and corresponding System record was created.</span> | <span style="color: #3e3f40">A, PTR, NS, SOA.</span> |

<span style="color: #000000">You can see those in the </span>**<span style="color: #000000">Record Source</span>**<span style="color: #000000"> column of the Resource Records Viewer for a specific zone.</span>

<span style="color: #000000">Updates to a Static, Dynamic, or System record over API or dynamic DNS do not change the initial record source.</span>

<span style="color: #3e3f40">System and combined records have some limitations that include:</span>

- <span style="color: #3e3f40">You cannot enable or disable System records.</span>
- <span style="color: #3e3f40">You cannot delete System records.</span>
- <span style="color: #3e3f40">You cannot modify the record data (RDATA).</span>

> ⚠️ <span style="color: #000000">Record data fields that are domain names—such as </span>**Domain Name**<span style="color: #000000"> for PTR records, </span>**Canonical Name**<span style="color: #000000"> for CNAME records, </span>**Target**<span style="color: #000000"> for DNAME records, </span>**Target Field**<span style="color: #000000"> of SRV records, </span>**Mail Exchanger**<span style="color: #000000"> for MX records, </span>**Replacement**<span style="color: #000000"> for NAPTR records, and </span>**Nameserver**<span style="color: #000000"> for NS records—can be either relative (to the zone name) or absolute. If these values are intended to be absolute, they </span>**must**<span style="color: #000000"> be explicitly terminated with a period (</span>`.`<span style="color: #000000">). Otherwise, the zone name will be appended to the user-supplied name to form a fully qualified domain name.</span>


<span style="color: #3e3f40">For more information about Dynamic DNS Updates, see</span> [*Updates*](https://infoblox-docs.atlassian.net/wiki/spaces/BloxOneDDI/pages/186941553) <span style="color: #3e3f40">and</span> [*Enabling DDNS for IPv4 Clients*](https://infoblox-docs.atlassian.net/wiki/spaces/BloxOneDDI/pages/186400924/Configuring+Global+DHCP+Properties#ConfiguringGlobalDHCPProperties-EnablingDDNSforIPv4Clients)*.*