Objects > External Dynamic Lists

An external dynamic list is an address object based on an imported list of IP addresses, URLs, domain names, International Mobile Equipment Identities (IMEIs), or International Mobile Subscriber Identities (IMSIs) that you can use in policy rules to block or allow traffic. This list must be a text file saved to a web server that is accessible by the firewall. By default, the firewall uses the management (MGT) interface to retrieve this list.
With an active Threat Prevention license, Palo Alto Networks provides multiple built-in dynamic IP lists that you can use to block malicious hosts. We update the lists daily based on our latest threat research.
You can use an IP address list as an address object in the source and destination of your policy rules; you can use a URL List in a URL Filtering profile (Objects > Security Profiles > URL Filtering) or as a match criteria in Security policy rules; and you can use a domain list (Objects > Security Profiles > Anti-Spyware Profile) as a sinkhole for specified domain names.
On each firewall model, you can use up to 30 external dynamic lists with unique sources across all Security policy rules. The maximum number of entries that the firewall supports for each list type varies based on the firewall model (refer to the different firewall limits for each external dynamic list type). List entries count toward the maximum limit only if the external dynamic list is used in a policy rule. If you exceed the maximum number of entries that are supported on a firewall model, the firewall generates a System log and skips the entries that exceed the limit. To check the number of IP addresses, domains, URLs, IMEIs, and IMSIs currently used in policy rules and the total number supported on the firewall, select
List Capacities
(
firewall only
).
The external dynamic lists are shown in the order they are evaluated from top to bottom. Use the directional controls at the bottom of the page to change the list order. This enables you to reorder the lists to make sure that the most important entries in an external dynamic list are committed before you reach capacity limits.
You cannot change the external dynamic list order when lists are grouped by type.
To retrieve the latest version of the external dynamic list from the server that hosts it, select an external dynamic list and
Import Now
.
You cannot delete, clone, or edit the settings of the Palo Alto Networks malicious IP address feeds.
Add
a new external dynamic list and configure the settings described in the table below.
External Dynamic List Settings
Description
Name
Enter a name to identify the external dynamic list (up to 32 characters). This name identifies the list for policy rule enforcement.
Shared
(
Multiple virtual systems (multi-vsys) and Panorama only
)
Enable this option if you want the external dynamic list to be available to:
  • Every virtual system (vsys) on a multi-vsys firewall.
    If you disable (clear) this option, then the external dynamic list is available only to the
    Virtual System
    selected in the
    Objects
    tab.
  • Every device group on Panorama.
    If you disable (clear) this option, the external dynamic list is available only to the
    Device Group
    selected in the
    Objects
    tab.
Disable override (
Panorama only
)
Enable this option to prevent administrators from overriding the settings of this external dynamic list object in device groups that inherit the object. This option is disabled (cleared) by default, which means administrators can override the settings for any device group that inherits the object.
Test Source URL (
Firewall only
)
Test Source URL
to verify that the firewall can connect to the server that hosts the external dynamic list.
This test does not check whether the server authenticates successfully.
Create List Tab
Type
You cannot mix IP addresses, URLs, and domain names in a single list. Each list must include entries of only one type.
Select from the following types of external dynamic lists:
  • Predefined IP List
    —Use a list that Palo Alto Networks identifies as bulletproof IP addresses, known malicious IP addresses, or high risk IP addresses as a source of list entries (requires an active Threat Prevention license).
  • Predefined URL List
    —Use a list of domains that Palo Alto Networks identifies as trusted to exclude these domains from Authentication policy.
  • IP List
    (default)—Each list can include IPv4 or IPv6 addresses, address ranges, and subnets. The list must contain only one IP address, range, or subnet per line. For example:
    192.168.80.150/32 2001:db8:123:1::1 or 2001:db8:123:1::/64 192.168.80.0/24 2001:db8:123:1::1 - 2001:db8:123:1::22
    In the example above, the first line indicates all addresses from 192.168.80.0 through 192.168.80.255. A subnet or an IP address range, such as 92.168.20.0/24 or 192.168.20.40 – 192.168.20.50, counts as one IP address entry and not as multiple IP addresses.
  • Domain List
    —Each list can contain only one domain name entry per line. For example:
    www.p301srv03.paloalonetworks.com ftp.example.co.uk test.domain.net
    For the list of domains included in the external dynamic list, the firewall creates a set of custom signatures of the spyware type with medium severity so that you can use the sinkhole action for a custom list of domains.
  • URL List
    —Each list can have only one URL entry per line. For example:
    financialtimes.co.in www.wallaby.au/joey www.exyang.com/auto-tutorials/How-to-enter-Data-for-Success.aspx *.example.com/*
    For each URL list, the default action is set to
    Allow
    . To edit the default action, see Objects > Security Profiles > URL Filtering.
Type (cont)
  • Subscriber Identity List
    —Each list contains subscriber IDs for a 3G, 4G, or 5G network. In the Source field, enter a URL for the firewall to access the list.
  • Equipment Identity List
    —Each list contains equipment IDs for a 3G, 4G, or 5G network. In the Source field, enter a URL for the firewall to access the list.
    Determine which firewall model to purchase based on the total number of 3G, 4G, and 5G network identifiers you need your dynamic external dynamic list and static entries to support.
Description
Enter a description for the external dynamic list (up to 255 characters).
Source
  • If the external dynamic list is a Predefined IP List, select
    Palo Alto Networks
    -
    Bulletproof IP addresses
    ,
    Palo Alto Networks
    -
    High risk IP addresses
    , or
    Palo Alto Networks
    -
    Known malicious IP addresses
    as the list source.
  • If the external dynamic list is a Predefined URL List, the default setting is
    panw-auth-portal-exclude-list
    .
  • If the external dynamic list is an IP List, a Domain List, or a URL List, enter an HTTP or HTTPS URL path that contains the text file (for example,
    http://192.0.2.20/myfile.txt
    ).
  • If the external dynamic list is a Domain List, the default setting is to
    Automatically expand to include subdomains
    . This option enables the PAN-OS
    ®
    software to evaluate all lower-level components of the domain names listed in the external dynamic list file.
  • If the external dynamic list is a Subscriber Identity List or Equipment Identity List, enter a URL path that contains the list.
If your external dynamic list contains subdomains, these expanded entries count towards your appliance model capacity count. You can disable this feature if you want to manually define subdomains. However, subdomains that are not explicitly defined in the list are not evaluated by policy rules.
Certificate Profile
(
IP List, Domain List, or URL List only
)
If the external dynamic list has an HTTPS URL, select an existing certificate profile (
firewall and Panorama
) or create a new
Certificate Profile
(
firewall only
) for authenticating the web server that hosts the list. For more information on configuring a certificate profile, see Device > Certificate Management > Certificate Profile.
Default:
None (Disable Cert profile)
To maximize the number of external dynamic lists that you can use to enforce policy, use the same certificate profile to authenticate external dynamic lists that use the same source URL so that the lists count as only one external dynamic list. External dynamic lists from the same source URL that use different certificate profiles are counted as unique external dynamic lists.
Client Authentication
Enable this option (disabled by default) to add a username and password that the firewall will use when accessing an external dynamic list source that requires basic HTTP authentication. This setting is available only when the external dynamic list has an HTTPS URL.
  • Username
    —Enter a valid username to access the list.
  • Password/Confirm Password
    —Enter and confirm the password for the username.
Check for updates
Specify the frequency at which the firewall retrieves the list from the web server. You can set the interval to every
Every Five Minutes
(default),
Hourly
,
Daily
,
Weekly
, or
Monthly
, at which the firewall retrieves the list. 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. The commit updates all policy rules that reference the list so that the firewall can successfully enforce policy rules.
You do not have to configure a frequency for a predefined IP list because the firewall dynamically receives content updates with an active Threat Prevention license.
List Entries and Exceptions Tab
List Entries
Displays the entries in the external dynamic list.
  • Add an entry as a list exception
    —Select up to 100 entries and
    Submit
    ( ).
  • View an AutoFocus threat intelligence summary for an item
    —Hover over an entry and select
    AutoFocus
    from the drop-down. You must have an AutoFocus™ license and enable AutoFocus threat intelligence to view an item summary (select
    Device
    Setup
    Management
    and edit the
    AutoFocus
    settings).
  • Check if an IP address, domain, or URL is in the external dynamic list
    —Enter a value in the filter field and
    Apply Filter
    ( ).
    Clear Filter
    (
    [X]
    ) to go back to viewing the complete list.
Manual Exceptions
Displays exceptions to the external dynamic list.
  • Edit an exception
    —Select an exception and make your changes.
  • Manually enter an exception
    Add
    a new exception manually.
  • Remove an exception from the Manual Exceptions list
    —Select and
    Delete
    an exception.
  • Check if an IP address, domain, or URL is in the Manual Exceptions list
    —Enter a value in the filter field and
    Apply Filter
    ( ).
    Clear Filter
    (
    [X]
    ) to go back to viewing the complete list. You cannot save your changes to the external dynamic list if you have duplicate entries in the Manual Exceptions list.

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