An external dynamic list is a text file that
is hosted on an external web server. You can use this list to import
URLs and enforce policy on these URLs. The firewall dynamically
imports the list at the configured interval and enforces policy
for the URLs (IP addresses or domains are ignored) in the list.
When the list is updated on the web server, the firewall retrieves
the changes and applies policy to the modified list without requiring
a commit on the firewall.