Configure the Firewall to Access an External Dynamic List

You must establish the connection between the firewall and the source that hosts the external dynamic list before you can Enforce Policy on an External Dynamic List.
  1. (
    ) Customize the service route that the firewall uses to retrieve external dynamic lists.
    Service Route Configuration
    and modify the
    External Dynamic Lists
    service route.
    The firewall does not use the External Dynamic Lists service route to retrieve Built-in External Dynamic Lists; content updates modify or update the contents of those lists (active Threat Prevention license required).
  2. Find an external dynamic list to use with the firewall.
    • Create an external dynamic list and host it on a web server. Enter IP addresses, domains, or URLs in a blank text file. Each list entry must be on a separate line. For example:
      See the Formatting Guidelines for an External Dynamic List to ensure that the firewall does not skip list entries. To prevent commit errors and invalid entries, do not prefix http:// or https:// to any of the entries.
    • Use an external dynamic list hosted by another source and verify that it follows the Formatting Guidelines for an External Dynamic List.
  3. Select
    External Dynamic Lists
  4. Click
    and enter a descriptive
    for the list.
  5. (
    ) Select
    to share the list with all virtual systems on a device that is enabled for multiple virtual systems. By default, the object is created on the virtual system that is currently selected in the
    Virtual Systems
    As a best practice, Palo Alto Networks recommends using shared EDLs when multiple virtual systems are used. Using individual EDLs with duplicate entries for each vsys uses more memory, which might over-utilize firewall resources.
  6. (
    Panorama only
    ) Select
    Disable override
    to ensure that a firewall administrator cannot override settings locally on a firewall that inherits this configuration through a Device Group commit from Panorama.
  7. Select the list
    (for example,
    URL List
    Ensure that the list only includes entries for the list type. See Verify whether entries in the external dynamic list were ignored or skipped.
    If you using a Domain List, you can optionally enable
    Automatically expand to include subdomains
    to also include the subdomains of a specified domain. For example, if your domain list includes, all lower level components of the domain name (e.g., * will also be included as part of the list. Keep in mind, when this setting is enabled, each domain in a given list requires an additional entry, effectively doubling the number of entries that are consumed.
  8. Enter the
    for the list you just created on the web server. The source must include the full path to access the list. For example,
    • If you are creating a Predefined IP external dynamic list, select a Palo Alto Networks malicious IP address feed to use as a source.
    • If you are creating a Predefined URL external dynamic list, select
      as a source.
  9. If the list source is secured with SSL (i.e. lists with an HTTPS URL), enable server authentication. Select a
    Certificate Profile
    or create a
    New Certificate Profile
    for authenticating the server that hosts the list. The certificate profile you select must have root certificate authority (CA) and intermediate CA certificates that match the certificates installed on the server you are authenticating.
    Maximize the number of external dynamic lists that you can use to enforce policy. Use the same certificate profile to authenticate external dynamic lists from the same source URL. If you assign different certificate profiles to external dynamic lists from the same source URL, the firewall counts each list as a unique external dynamic list.
  10. Enable client authentication if the list source has an HTTPS URL and requires basic HTTP authentication for list access.
    1. Select
      Client Authentication
    2. Enter a valid
      to access the list.
    3. Enter the
      Confirm Password
  11. (
    Not available on Panorama or for Predefined URL EDLs
    ) Click
    Test Source URL
    to verify that the firewall can connect to the web server.
    Test Source URL
    function is not available when authentication is used for EDL access.
  12. (
    ) Specify the frequency at which the firewall should
    Check for updates
    to the list. By default, the firewall retrieves the list once every hour and commits the changes.
    The interval is relative to the last commit. So, for the five-minute interval, the commit occurs in 5 minutes if the last commit was an hour ago. To retrieve the list immediately, see Retrieve an External Dynamic List from the Web Server.
  13. Click
    your changes.
  14. (
    ) EDLs are shown top to bottom, in order of evaluation. Use the directional controls at the bottom of the page to change the list order. This allows you to or order the lists to make sure the most important EDLs are committed before capacity limits are reached.
    You can only change the EDL order when
    Group By Type
    is deselected.
  15. If the server or client authentication fails, the firewall ceases to enforce policy based on the last successfully retrieved external dynamic list. Find External Dynamic Lists That Failed Authentication and view the reasons for authentication failure.

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