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[ScreenOS] Configuring Dynamic DNS Native (DDNS) on the Firewall Device



Article ID: KB4582 KB Last Updated: 29 Jun 2020Version: 10.0
Configuring Dynamic DNS (DDNS) Native on the Firewall Device.
noteBeginning with ScreenOS 5.1.0, you can configure the Firewall device as a Dynamic DNS (DDNS) client.

DDNS allows clients to dynamically update IP addresses for registered domain names. This is useful when an ISP uses PPP, DHCP, or XAuth to dynamically change the IP address for a Customer Premises Equipment (CPE) router (such as a NetScreen device) that protects a Web server. Therefore, any clients from the Internet can access the Web server using a domain name, even if the IP address of the CPE router has previously changed dynamically.

To configure Dynamic DNS native on the Firewall device, perform the following steps:

  1. Open the WebUI. For an example of how to access the WebUI, consult: KB4060 - Accessing Your NetScreen, SSG, or ISG Firewall Using the WebUI

  2. From the ScreenOS options menu, click Network, select DNS, and then click DDNS.


  3. Under DDNS Settings, click to select Config DDNS Client and Enable DDNS Client

  4. Click Apply.

  5. Click New.

  6. In the ID text box, enter an ID number.

  7. From Server Settings, in the Server Type drop-down menu, click to select the DDNS service you are using. The Server Name will populate automatically.
    The Clear text box specifies whether to use HTTP or HTTPS.  Check this box to disable HTTPS and use HTTP instead. The default is to use HTTPS encryption.

    IMPORTANT NOTE:  If Clear text is unchecked, then you need to install the Geotrust certificate.  Refer to KB7380 after completing the steps in this article

  8. Under Account Settings, in the Username and Password text boxes, enter the username and password assigned to you by the DDNS service.

  9. In the Bind to Interface drop-down menu, click to select ethernet0/1. In the Host Name text box, enter your Host Name.

  10. Click OK.

  11. REMEMBER:  If Clear text is unchecked (the default) in step 7, then you need to install the Geotrust certificate.  Refer to KB7380.

Modification History:
2020-06-29: Removed the old WebUI snapshots and replaced with new ones.

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