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Figure 47 DDNS application
With the DDNS client configured, a device can dynamically update the latest mapping between its
domain name and IP address on the DNS server through DDNS servers.
NOTE:
The DDNS update process does not have a unified standard but depends on the DDNS server that the
DDNS client contacts.
DDNS client configuration task list
Tasks at a
lance
(Required.) Configuring a DDNS policy
(Required.) Applying the DDNS policy to an interface
(Optional.) Setting the DSCP value for outgoing DDNS packets
Configuring a DDNS policy
A DDNS policy contains the DDNS server address, port number, login ID, password, time interval,
associated SSL client policy, and update time interval. After creating a DDNS policy, you can apply it to
multiple interfaces to simplify DDNS configuration.
The URL addresses configured for update requests vary by DDNS servers.
Table 5 Common URL addresses
DDNS server URL addresses for DDNS update requests
www.3322.org
http://members.3322.org/dyndns/update?system=dyndns&hostname=<h>&myip=<
a>
DYNDNS http://members.dyndns.org/nic/update?system=dyndns&hostname=<h>&myip=<a>
DYNS http://www.dyns.cx/postscript.php?host=<h>&ip=<a>
ZONEEDIT http://dynamic.zoneedit.com/auth/dynamic.html?host=<h>&dnsto=<a>
HTTP server
DDNS client
DDNS server
DNS server
IP network
HTTP client
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