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13-12
Cisco ASDM User Guide
OL-16647-01
Chapter 13 DHCP, DNS and WCCP Services
Dynamic DNS
Add/Edit Dynamic DNS Update Methods
The Add/Edit Dynamic DNS Update Methods dialog box lets you add a new method or edit a previously
added method. You can specify the method name (if adding a method), specify the interval between
DDNS update attempts, and specify whether the DDNS client attempts to update both or neither of the
two DNS records, the A record and the PTR record.
Fields
• Name—If you are adding a method, enter then name of the new method in this field. If you are
editing an existing method, this field is display-only and shows the name of the method selected for
editing.
• Update Interval—Specifies the time to elapse between update attempts. The interval ranges from 0
to nearly one year.
–
Days—Choose the number of days between update attempts from 0 to 364.
–
Hours—Choose the number of hours (in whole numbers) between update attempts from 0 to 23.
–
Minutes—Choose the number of minutes (in whole numbers) between update attempts from 0
to 59.
–
Seconds—Choose the number of minutes (in whole numbers) between update attempts from 0
to 59.
–
Update Records—Click Both (A and PTR Records) for the client to attempt updates to both the
A and PTR DNS resource records, or click A Records Only to update just the A records. This
is the individual method setting for DNS server records updated by the client.
These units are additive. That is, if you enter 0 days, 0 hours, 5 minutes and 15 seconds, the update
method will attempt an update every 5 minutes and 15 seconds for as long as the method is active.
Modes
The following table shows the modes in which this feature is available:
Add/Edit Dynamic DNS Interface Settings
The Add/Edit Dynamic DNS Interface Settings allows you to configure DDNS on a security appliance
interface. You can assign an update method, specify the hostname, and configure DHCP server updating
of both the A and PTR records by the client or neither.
Fields
• Interface—Choose an interface on which to configure DDNS from the menu.
• Update Method—Choose an available DDNS update method from the menu.
• Hostname—Enter the hostname of the DDNS client.
Firewall Mode Security Context
Routed Transparent Single
Multiple
Context System
• — • •—