Policy Object: Address Groups

Table of Contents

CLI Commands for Dynamic IP Addresses and Tags

Policy Object: Address Groups

Combine addresses that require the same security settings into address groups to simplify the creation of Security policies.

Where Can I Use This?	What Do I Need?
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To simplify the creation of Security policies, addresses that require the same security settings can be combined into address groups. An address group can be static or dynamic.

You can Add or update Address Groups and give them a detailed name and description.

There are two types of Address Groups you can use:

Dynamic Address Groups—Allow you to create policies that automatically adapt to changes, and are useful in infrastructures where changes in virtual machine location and IP addresses are frequent.
A dynamic address group populates its members based on tags and filters. Use AND and OR operators to build filters for a dynamic address group. All IP addresses or address groups that match the criteria you define become members of the dynamic address group.
Static Address Groups—Can include address objects, dynamic address groups, or a combination of both address objects and dynamic address groups.

Troubleshoot traffic that isn't being enforced as expected–check the status of specific devices to understand whether there’s a mismatch between expected policies (as configured) and enforced policies.

Dynamic Address Groups

A dynamic address group populates its members dynamically using look ups for tags and tag-based filters. Dynamic address groups are very useful if you have an extensive virtual infrastructure where changes in virtual machine location or IP address are frequent. For example, if you have a sophisticated failover setup or provision new virtual machines frequently and would like to apply policy to the traffic from or to the new machine without modifying the configuration or rules, use dynamic address groups.

To use a dynamic address group in policy, you must complete the following tasks:

Define a dynamic address group and reference it in a security rule.
The members of the dynamic address group are formed with the IP addresses and the corresponding tags. You can do this using external scripts that use the XML API.

Dynamic address groups can also include statically defined address objects. If you create an address object and apply the same tags that you have assigned to a dynamic address group, that dynamic address group will include all static and dynamic objects that match the tags. You can, therefore use tags to pull together both dynamic and static objects in the same address group.

Static Address Groups

A static address group can include address objects that are static, dynamic address groups, or it can be a combination of both address objects and dynamic address groups.

At its core, a static address group is a logical collection of address objects or other address groups. These collections can include individual IP addresses, ranges of IPs, or other address groups, forming a cohesive unit that represents a specific set of endpoints or network entities.

The primary advantage of using static address groups is their ability to streamline policy maintenance and updates. Instead of modifying multiple security rules individually, you can simply update the associated static address group. This change propagates across all rules referencing the group, ensuring consistency and saving valuable time.

Static address groups can also contribute to policy organization and clarity. By grouping similar address objects based on criteria such as geographical location, department, or function, you can develop security rules that are both comprehensive and comprehensible. This promotes a structured and easily navigable policy framework, crucial for maintaining an effective security posture.

Address Group Fields

When creating an Address Group, you can specify some or all of the following fields:

Address Group Settings	Description
Name	A name that describes the address group (up to 63 characters). This name appears in the address list when defining Security policies. The name is case-sensitive and must be unique. Use only letters, numbers, spaces, hyphens, and underscores.
Shared	When this option is selected, the address group isavailable to: Every virtual system (vsys) on a multi-vsys. If you clear this selection, the address group will be available only to the virtual system selected. Every device group on Panorama.
Disable override (`Panorama only`)	Select this option to prevent administrators from overriding the settings of this address group object in device groups that inherit the object. This selection is cleared by default, which means administrators can override the settings for any device group that inherits the object.
Description	Enter a description for the object (up to 1023 characters).
Type	The type can be Static or Dynamic. To view the list of attributes for the match criteria, you must access and retrieve the attributes from the source/host. Each virtual machine on the configured information source(s) can be polled to retrieve changes in IP address or configuration.
Tags	Select or enter the tags that you wish to apply to this address group.
Members Count and Address	After you add an address group, the Members Count column indicates whether the objects in the group are populated dynamically or statically. For a static address group, you can view the count of the members in the address group. For an address group that uses tags to dynamically populate members or has both static and dynamic members, you can view the IP addresses that are registered to the address group. Type indicates whether the IP address is a static address object or being dynamically registered and displays the IP address. Action allows you to unregister tags from an IP address.

Use Dynamic Address Groups in Policy

Dynamic Address Groups are used in policy. They allow you to create policy that automatically adapts to changes—adds, moves, or deletions of servers. It also enables the flexibility to apply different rules to the same server based on tags that define its role on the network, the operating system, or the different kinds of traffic it processes.

A Dynamic Address Group uses tags as a filtering criteria to determine its members. The filter uses logical and and or operators. All IP addresses or address groups that match the filtering criteria become members of the Dynamic Address Group. Tags can be defined statically or registered (dynamically). The difference between static and dynamic tags is that static tags are part of the configuration, and dynamic tags are part of the runtime configuration. This implies that a commit isn't required to update dynamic tags; the tags must however be used by Dynamic Address Groups that are referenced in policy, and the policy must be committed.

Keep reading to learn how to use a dynamic address group in your deployment's Security policy.

Use Dynamic Address Groups in Policy (Strata Cloud Manager)

Create security rules that automatically adapts to changes.

The following example shows how Dynamic Address Groups can simplify network security enforcement. The example workflow shows how to:

Create Dynamic Address Groups and define the tags to filter.
Use Dynamic Address Groups in policy.

Create Dynamic Address Groups.

View the tutorial to see a big picture view of the feature.
1. Select ManageNGFW and Prisma AccessObjectsAddressAddress Groups.
2. Select Add Address Group and enter a Name and a Description for the address group.
3. Select Type as Dynamic.
4. Define the match criteria. You can select dynamic and static tags as the match criteria to populate the members of the group. Click Add Match Criteria, and select the And or Or operator and select the attributes that you would like to filter for or match against, then select Save. Negation isn’t supported.
5. Click Commit.
Use Dynamic Address Groups in policy.

View the tutorial.
1. Select ManageNGFW and Prisma AccessSecurity ServicesSecurity Policy.
2. Select Add Rule and enter a Name and a Description for the policy.
3. Add the Source Zone to specify the zone from which the traffic originates.
4. Add the Destination Zone at which the traffic is terminating.
5. For the Destination Address, select the Dynamic Address Group you just created.
6. Specify the action— Allow or Deny—for the traffic, and optionally attach the default security profiles to the rule.
7. Repeats steps 1 through 6 to create another security rule.
8. Select Push Config.

Use Dynamic Address Groups in Policy (PAN-OS & Panorama)

Create security rules that automatically adapts to changes.

To dynamically register tags, you can use the XML API or the VM Monitoring agent on the firewall or on the User-ID agent. Each tag is a metadata element or attribute-value pair that is registered on the firewall or Panorama. For example, IP1 {tag1, tag2,.....tag32}, where the IP address and the associated tags are maintained as a list; each registered IP address can have up to 32 tags such as the operating system, the data center or the virtual switch to which it belongs. After receiving the API call, the firewall registers the IP address and associated tags, and automatically updates the membership information for the dynamic address group(s).

The maximum number of IP addresses that can be registered for each model is different. Use the following table for specifics on your model:

Model	Maximum number of dynamically registered IP addresses
M-Series and Panorama virtual appliances	500,000
PA-5400 Series (excepting the PA-5450), PA-5200 Series, VM-7000 SMC-B Series	500,000
VM-500, VM-700	300,000
PA-3430, PA-3440, PA-3200 Series, VM-300	200,000
PA-3410, PA-3420	150,000
PA-7000 Series, PA-5450, PA-450, PA-460	100,000
PA-440	50,000
PA-850, VM-100	2,500
PA-820, PA-410, PA-220, VM-50	1,000

An IP set, such as an IP range or subnet, is considered as a single registered IP address when counted toward the maximum number of registered IP addresses supported by each firewall model.

The following example shows how Dynamic Address Groups can simplify network security enforcement. The example workflow shows how to:

Enable the VM Monitoring agent on the firewall, to monitor the VMware ESX(i) host or vCenter Server and register VM IP addresses and the associated tags.
Create Dynamic Address Groups and define the tags to filter. In this example, two address groups are created. One that only filters for dynamic tags and another that filters for both static and dynamic tags to populate the members of the group.
Validate that the members of the Dynamic Address Group are populated on the firewall.
Use Dynamic Address Groups in policy. This example uses two different Security policies:
- A Security policy for all Linux servers that are deployed as FTP servers; this rule matches on dynamically registered tags.
- A Security policy for all Linux servers that are deployed as web servers; this rule matches on a Dynamic Address Group that uses static and dynamic tags.
Validate that the members of the Dynamic Address Groups are updated as new FTP or web servers are deployed. This ensures that the security rules are enforced on these new virtual machines too.

Enable VM Source Monitoring.

See Enable VM Monitoring to Track Changes on the Virtual Network.
Create Dynamic Address Groups on the firewall.

View the tutorial to see a big picture view of the feature.
1. Log in to the web interface of the firewall.
2. Select ObjectAddress Groups.
3. Click Add and enter a Name and a Description for the address group.
4. Select Type as Dynamic.
5. Define the match criteria. You can select dynamic and static tags as the match criteria to populate the members of the group. Click Add Match Criteria, and select the And or Or operator and select the attributes that you would like to filter for or match against, then click OK. Negation isn’t supported.
6. Click Commit.
The match criteria for each Dynamic Address Group in this example is as follows:

ftp_server: matches on the guest operating system “Linux 64-bit” and annotated as “ftp” ('guestos.Ubuntu Linux 64-bit' and 'annotation.ftp').

web-servers: matches on two criteria—the tag black or if the guest operating system is Linux 64-bit and the name of the server us Web_server_Corp. ('guestos.Ubuntu Linux 64-bit' and 'vmname.WebServer_Corp' or 'black')
Use Dynamic Address Groups in policy.

View the tutorial.
1. Select PoliciesSecurity.
2. Click Add and enter a Name and a Description for the policy.
3. Add the Source Zone to specify the zone from which the traffic originates.
4. Add the Destination Zone at which the traffic is terminating.
5. For the Destination Address, select the Dynamic Address Group you just created.
6. Specify the action— Allow or Deny—for the traffic, and optionally attach the default security profiles to the rule.
7. Repeats steps 1 through 6 to create another security rule.
8. Click Commit.
This example shows how to create two policies: one for all access to FTP servers and the other for access to web servers.
Validate that the members of the Dynamic Address Group are populated on the firewall.
1. Select PoliciesSecurity, and select the rule.
2. Select the drop-down arrow next to the address group link, and select Value. You can also verify that the match criteria is accurate.
3. Click the more link and verify that the list of registered IP addresses is displayed.
  
  Policy will be enforced for all IP addresses that belong to this address group, and are displayed here.
If you want to delete all registered IP addresses, use the CLI command debug object registered-ip clear all and then reboot the firewall after clearing the tags.