method (DDNS policy view)

Function

The method command sets the update mode for the device functioning as a DDNS client.

The undo method command restores the default update mode for the device functioning as a DDNS client.

By default, the update mode is vendor-specific for the device functioning as the DDNS client.

Format

method { ddns [ both ] | http | vendor-specific }

undo method

Parameters

Parameter	Description	Value
ddns [ both ]	Indicates that the update mode is ddns (defined by the RFC2136) for the device functioning as a DDNS client. If both is specified, both Class-A and PTR query records are updated. If both is not specified, only Class-A query records are updated Class-A query records: mapping between domain names and IP addresses provided by the DNS server for Class-A query. In Class-A query, an IP address is obtained based on a domain name. PTR query records: mapping between domain names and IP addresses provided by the DNS server for PTR query. In PTR query, a domain name is obtained using an IP address.	-
http	Indicates that the update mode is http for the device functioning as a DDNS client. After this parameter is specified, the DDNS client can communicate with a common DDNS server through HTTP.	-
vendor-specific	Indicates that the update mode is vendor-specific for the device functioning as a DDNS client. After this parameter is specified, the DDNS client can communicate with the DDNS servers provided at www.3322.org, www.dyndns.org, and www.oray.cn.	-

Parameter

Description

Value

ddns [ both ]

Indicates that the update mode is ddns (defined by the RFC2136) for the device functioning as a DDNS client.

If both is specified, both Class-A and PTR query records are updated. If both is not specified, only Class-A query records are updated

Class-A query records: mapping between domain names and IP addresses provided by the DNS server for Class-A query. In Class-A query, an IP address is obtained based on a domain name.
PTR query records: mapping between domain names and IP addresses provided by the DNS server for PTR query. In PTR query, a domain name is obtained using an IP address.

http

Indicates that the update mode is http for the device functioning as a DDNS client. After this parameter is specified, the DDNS client can communicate with a common DDNS server through HTTP.

vendor-specific

Indicates that the update mode is vendor-specific for the device functioning as a DDNS client. After this parameter is specified, the DDNS client can communicate with the DDNS servers provided at www.3322.org, www.dyndns.org, and www.oray.cn.

Views

DDNS policy view

Default Level

2: Configuration level

Usage Guidelines

When the device functioning as a DDNS client needs to update the mapping between domain names and IP addresses on the DNS server, the following update modes are supported:

DDNS update mode (defined by the RFC2136): The DDNS client dynamically updates the mapping between domain names and IP addresses on the DNS server. To configure this mode, specify the ddns parameter.
Update mode implemented through the DDNS server: The DDNS client sends the mapping between domain names and IP addresses to the DDNS server with a specified URL. The DDNS server then informs the DNS server to dynamically update the mapping between domain names and IP addresses. To configure this mode, specify the http or vendor-specific parameter.
- To use the Siemens DDNS server or DDNS server provided at www.3322.org, www.dyndns.org, or www.oray.cn, specify the vendor-specific parameter.
- To use an HTTP-based common DDNS server, specify the http parameter.

Security risks exist if the update mode for the device functioning as a DDNS client is set to http or vendor-specific. It is recommended that you set the update mode to ddns.

Example

# Set the update mode of the device functioning as the DDNS client to DDNS, and update Class-A and PTR query records.

<sysname> system-view
[sysname] ddns policy mypolicy
[sysname-ddns-policy-mypolicy] method ddns both

# Restore the default update mode for the device functioning as the DDNS client.

<sysname> system-view
[sysname] ddns policy mypolicy
[sysname-ddns-policy-mypolicy] undo method