DDNS Settings

When a network supports Dynamic DNS (DDNS), Intel AMT will update the DNS server with its IP addresses. Intel AMT gets the DNS server IP either from DHCP or from a static setting. Intel AMT will update the DNS zone with both IPv4 and IPv6 addresses. The Intel AMT DDNS feature only supports forward look-up non-secure DNS zones. The DDNS mechanism works when Intel AMT has a dedicated FQDN (both IPV4 and IPv6 addresses) and also when it shares an FQDN with the host (IPv4 addressing only). Intel AMT does not support a configuration with shared FQDN + DDNS enabled + IPv6.

Starting with Release 6.0 the Intel AMT FQDN can be either shared (i.e., the same as the host FQDN) or dedicated. The Intel AMT FQDN consists of two fields: its host name and its domain name. When the FQDN is shared, both must be the same as the host. In a dedicated FQDN, at least one of the two fields must be different from the host.

The HostOSFQDN is read only – It represents the OS Host FQDN.

The DDNS settings are part of the AMT_GeneralSettings object. See Get DDNS Settings and Set/Get General Network Settings.

The settings include:

Property

Description

DDNSTTL

The TTL of a record in the DNS zone (in seconds)

DDNSPeriodicUpdateInterval

Defines the interval that Intel AMT sends DNS updates to the DNS server. Units are minutes. A value of 0 disables DNS notifications. The minimum allowed value other than 0 is 20 minutes. The default value for this property is 1440 minutes (one day).

DDNSUpdateEnable

True or False: enables the DDNS update mechanism.

The DDNS settings are modifiable on the MEBx AMT Names Settings page and on the WebUI System Names Settings page.

The following table shows the conditions when Intel AMT updates a DNS server using the DDNS client.

 

Shared IPv4 (Static IP)

Shared IPv4 (DHCP)

Dedicated IPv4 (Static IP)

IPv6 Enabled

IPv6 Disabled

IPv6 Enabled

IPv6 Disabled

IPv6 Enabled

IPv6 Disabled

Shared FQDN

Intel AMT updates DNS records when the host driver is down except for AAAA records (IPv6)

Intel AMT updates DNS records when driver down

Intel AMT updates DNS records when the host driver is down if DHCPv4 Option 81 doesn't have S bit except for AAAA records (IPv6)

Intel AMT updates DNS records when driver down if DHCPv4 Option 81 does not have S bit

not supported

not supported

Dedicated FQDN

Intel AMT updates DNS records

Intel AMT updates DNS records

Intel AMT updates DNS records if DHCPv4 Option 81 does not have S bit

Intel AMT updates DNS records if DHCPv4 Option 81 does not have S bit

Intel AMT updates DNS records

Intel AMT updates DNS records

 

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