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Configuring the WAN
Cisco ISA500 Series Integrated Security Appliances Administration Guide 134
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Configuring Dynamic DNS
Use the Networking > WAN > DDNS page to configure Dynamic DNS (DDNS).
DDNS is an Internet service that allows routers with varying public IP addresses to
be located using Internet domain names. If your ISP has not provided you with a
static IP and your WAN connection is configured to use DHCP to obtain an IP
address dynamically, then DDNS provides the domain name to map the dynamic
IP address for your website. To use DDNS, you must set up an account with a
DDNS provider such as DynDNS.com.
DDNS Services Table
The Status column displays the status of DDNS service. Click Active to manually
update the IP address of the WAN interface to the user-specified domain name.
• Non-active: The DDNS service is not active (DDNS daemon does not start).
• Active (initial): The DDNS daemon starts but the DDNS updating process is
not complete yet.
• Active (updated WANx): The DDNS updating process is complete and the
address of the WAN interface is updated to the user-specified domain name.
Adding or modifying a DDNS service
Click Add to add a new DDNS service. To edit an entry, click the Edit (pencil) icon.
To delete an entry, click the Delete (x) icon.
STEP 1 Enter the following information:
• Service: Specify the provider for your DDNS service. You can choose either
DynDNS or No-IP service.
NOTE: You must sign up for an account with either one of these providers
before you can use this service.
• Active on Startup: Check this box to activate the DDNS service when the
security appliance starts up.
• WAN Interface: Choose the WAN port for the DDNS service. Traffic for the
DDNS services will pass through the specified WAN port.
NOTE: If the WAN redundancy is set as the Failover mode, this option is
grayed out. When WAN failover occurs, DDNS will switch traffic to the active
WAN port .
• User Name: Enter the username of the account that you registered in the
DDNS provider.