External Dynamic List
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Next-Generation Firewall Docs
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PAN-OS 11.0 (EoL)
- PAN-OS 11.1 & Later
- PAN-OS 11.0 (EoL)
- PAN-OS 10.2
- PAN-OS 10.1
- PAN-OS 10.0 (EoL)
- PAN-OS 9.1 (EoL)
- Cloud Management of NGFWs
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- Management Interfaces
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- Launch the Web Interface
- Configure Banners, Message of the Day, and Logos
- Use the Administrator Login Activity Indicators to Detect Account Misuse
- Manage and Monitor Administrative Tasks
- Commit, Validate, and Preview Firewall Configuration Changes
- Commit Selective Configuration Changes
- Export Configuration Table Data
- Use Global Find to Search the Firewall or Panorama Management Server
- Manage Locks for Restricting Configuration Changes
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- Define Access to the Web Interface Tabs
- Provide Granular Access to the Monitor Tab
- Provide Granular Access to the Policy Tab
- Provide Granular Access to the Objects Tab
- Provide Granular Access to the Network Tab
- Provide Granular Access to the Device Tab
- Define User Privacy Settings in the Admin Role Profile
- Restrict Administrator Access to Commit and Validate Functions
- Provide Granular Access to Global Settings
- Provide Granular Access to the Panorama Tab
- Provide Granular Access to Operations Settings
- Panorama Web Interface Access Privileges
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- Reset the Firewall to Factory Default Settings
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- Plan Your Authentication Deployment
- Pre-Logon for SAML Authentication
- Configure SAML Authentication
- Configure Kerberos Single Sign-On
- Configure Kerberos Server Authentication
- Configure TACACS+ Authentication
- Configure RADIUS Authentication
- Configure LDAP Authentication
- Configure Local Database Authentication
- Configure an Authentication Profile and Sequence
- Test Authentication Server Connectivity
- Troubleshoot Authentication Issues
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- Keys and Certificates
- Default Trusted Certificate Authorities (CAs)
- Certificate Deployment
- Configure the Master Key
- Export a Certificate and Private Key
- Configure a Certificate Profile
- Configure an SSL/TLS Service Profile
- Configure an SSH Service Profile
- Replace the Certificate for Inbound Management Traffic
- Configure the Key Size for SSL Forward Proxy Server Certificates
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- HA Overview
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- Prerequisites for Active/Active HA
- Configure Active/Active HA
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- Use Case: Configure Active/Active HA with Route-Based Redundancy
- Use Case: Configure Active/Active HA with Floating IP Addresses
- Use Case: Configure Active/Active HA with ARP Load-Sharing
- Use Case: Configure Active/Active HA with Floating IP Address Bound to Active-Primary Firewall
- Use Case: Configure Active/Active HA with Source DIPP NAT Using Floating IP Addresses
- Use Case: Configure Separate Source NAT IP Address Pools for Active/Active HA Firewalls
- Use Case: Configure Active/Active HA for ARP Load-Sharing with Destination NAT
- Use Case: Configure Active/Active HA for ARP Load-Sharing with Destination NAT in Layer 3
- HA Clustering Overview
- HA Clustering Best Practices and Provisioning
- Configure HA Clustering
- Refresh HA1 SSH Keys and Configure Key Options
- HA Firewall States
- Reference: HA Synchronization
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- Use the Dashboard
- Monitor Applications and Threats
- Monitor Block List
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- Report Types
- View Reports
- Configure the Expiration Period and Run Time for Reports
- Disable Predefined Reports
- Custom Reports
- Generate Custom Reports
- Generate the SaaS Application Usage Report
- Manage PDF Summary Reports
- Generate User/Group Activity Reports
- Manage Report Groups
- Schedule Reports for Email Delivery
- Manage Report Storage Capacity
- View Policy Rule Usage
- Use External Services for Monitoring
- Configure Log Forwarding
- Configure Email Alerts
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- Configure Syslog Monitoring
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- Traffic Log Fields
- Threat Log Fields
- URL Filtering Log Fields
- Data Filtering Log Fields
- HIP Match Log Fields
- GlobalProtect Log Fields
- IP-Tag Log Fields
- User-ID Log Fields
- Decryption Log Fields
- Tunnel Inspection Log Fields
- SCTP Log Fields
- Authentication Log Fields
- Config Log Fields
- System Log Fields
- Correlated Events Log Fields
- GTP Log Fields
- Audit Log Fields
- Syslog Severity
- Custom Log/Event Format
- Escape Sequences
- Forward Logs to an HTTP/S Destination
- Firewall Interface Identifiers in SNMP Managers and NetFlow Collectors
- Monitor Transceivers
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- User-ID Overview
- Enable User-ID
- Map Users to Groups
- Enable User- and Group-Based Policy
- Enable Policy for Users with Multiple Accounts
- Verify the User-ID Configuration
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- App-ID Overview
- App-ID and HTTP/2 Inspection
- Manage Custom or Unknown Applications
- Safely Enable Applications on Default Ports
- Applications with Implicit Support
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- Prepare to Deploy App-ID Cloud Engine
- Enable or Disable the App-ID Cloud Engine
- App-ID Cloud Engine Processing and Policy Usage
- New App Viewer (Policy Optimizer)
- Add Apps to an Application Filter with Policy Optimizer
- Add Apps to an Application Group with Policy Optimizer
- Add Apps Directly to a Rule with Policy Optimizer
- Replace an RMA Firewall (ACE)
- Impact of License Expiration or Disabling ACE
- Commit Failure Due to Cloud Content Rollback
- Troubleshoot App-ID Cloud Engine
- Application Level Gateways
- Disable the SIP Application-level Gateway (ALG)
- Maintain Custom Timeouts for Data Center Applications
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- Decryption Overview
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- Keys and Certificates for Decryption Policies
- SSL Forward Proxy
- SSL Forward Proxy Decryption Profile
- SSL Inbound Inspection
- SSL Inbound Inspection Decryption Profile
- SSL Protocol Settings Decryption Profile
- SSH Proxy
- SSH Proxy Decryption Profile
- Profile for No Decryption
- SSL Decryption for Elliptical Curve Cryptography (ECC) Certificates
- Perfect Forward Secrecy (PFS) Support for SSL Decryption
- SSL Decryption and Subject Alternative Names (SANs)
- TLSv1.3 Decryption
- High Availability Not Supported for Decrypted Sessions
- Decryption Mirroring
- Configure SSL Forward Proxy
- Configure SSL Inbound Inspection
- Configure SSH Proxy
- Configure Server Certificate Verification for Undecrypted Traffic
- Enable Users to Opt Out of SSL Decryption
- Temporarily Disable SSL Decryption
- Configure Decryption Port Mirroring
- Verify Decryption
- Activate Free Licenses for Decryption Features
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- Policy Types
- Policy Objects
- Track Rules Within a Rulebase
- Enforce Policy Rule Description, Tag, and Audit Comment
- Move or Clone a Policy Rule or Object to a Different Virtual System
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- External Dynamic List
- Built-in External Dynamic Lists
- Configure the Firewall to Access an External Dynamic List
- Retrieve an External Dynamic List from the Web Server
- View External Dynamic List Entries
- Exclude Entries from an External Dynamic List
- Enforce Policy on an External Dynamic List
- Find External Dynamic Lists That Failed Authentication
- Disable Authentication for an External Dynamic List
- Register IP Addresses and Tags Dynamically
- Use Dynamic User Groups in Policy
- Use Auto-Tagging to Automate Security Actions
- CLI Commands for Dynamic IP Addresses and Tags
- Application Override Policy
- Test Policy Rules
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- Network Segmentation Using Zones
- How Do Zones Protect the Network?
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PAN-OS 11.1 & Later
- PAN-OS 11.1 & Later
- PAN-OS 11.0 (EoL)
- PAN-OS 10.2
- PAN-OS 10.1
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- Tap Interfaces
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- Layer 2 and Layer 3 Packets over a Virtual Wire
- Port Speeds of Virtual Wire Interfaces
- LLDP over a Virtual Wire
- Aggregated Interfaces for a Virtual Wire
- Virtual Wire Support of High Availability
- Zone Protection for a Virtual Wire Interface
- VLAN-Tagged Traffic
- Virtual Wire Subinterfaces
- Configure Virtual Wires
- Configure a PPPoE Client on a Subinterface
- Configure an IPv6 PPPoE Client
- Configure an Aggregate Interface Group
- Configure Bonjour Reflector for Network Segmentation
- Use Interface Management Profiles to Restrict Access
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- DHCP Overview
- Firewall as a DHCP Server and Client
- Firewall as a DHCPv6 Client
- DHCP Messages
- Dynamic IPv6 Addressing on the Management Interface
- Configure an Interface as a DHCP Server
- Configure an Interface as a DHCPv4 Client
- Configure an Interface as a DHCPv6 Client with Prefix Delegation
- Configure the Management Interface as a DHCP Client
- Configure the Management Interface for Dynamic IPv6 Address Assignment
- Configure an Interface as a DHCP Relay Agent
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- DNS Overview
- DNS Proxy Object
- DNS Server Profile
- Multi-Tenant DNS Deployments
- Configure a DNS Proxy Object
- Configure a DNS Server Profile
- Use Case 1: Firewall Requires DNS Resolution
- Use Case 2: ISP Tenant Uses DNS Proxy to Handle DNS Resolution for Security Policies, Reporting, and Services within its Virtual System
- Use Case 3: Firewall Acts as DNS Proxy Between Client and Server
- DNS Proxy Rule and FQDN Matching
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- NAT Rule Capacities
- Dynamic IP and Port NAT Oversubscription
- Dataplane NAT Memory Statistics
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- Translate Internal Client IP Addresses to Your Public IP Address (Source DIPP NAT)
- Create a Source NAT Rule with Persistent DIPP
- PAN-OS
- Strata Cloud Manager
- Enable Clients on the Internal Network to Access your Public Servers (Destination U-Turn NAT)
- Enable Bi-Directional Address Translation for Your Public-Facing Servers (Static Source NAT)
- Configure Destination NAT with DNS Rewrite
- Configure Destination NAT Using Dynamic IP Addresses
- Modify the Oversubscription Rate for DIPP NAT
- Reserve Dynamic IP NAT Addresses
- Disable NAT for a Specific Host or Interface
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- Network Packet Broker Overview
- How Network Packet Broker Works
- Prepare to Deploy Network Packet Broker
- Configure Transparent Bridge Security Chains
- Configure Routed Layer 3 Security Chains
- Network Packet Broker HA Support
- User Interface Changes for Network Packet Broker
- Limitations of Network Packet Broker
- Troubleshoot Network Packet Broker
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- Enable Advanced Routing
- Logical Router Overview
- Configure a Logical Router
- Create a Static Route
- Configure BGP on an Advanced Routing Engine
- Create BGP Routing Profiles
- Create Filters for the Advanced Routing Engine
- Configure OSPFv2 on an Advanced Routing Engine
- Create OSPF Routing Profiles
- Configure OSPFv3 on an Advanced Routing Engine
- Create OSPFv3 Routing Profiles
- Configure RIPv2 on an Advanced Routing Engine
- Create RIPv2 Routing Profiles
- Create BFD Profiles
- Configure IPv4 Multicast
- Configure MSDP
- Create Multicast Routing Profiles
- Create an IPv4 MRoute
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PAN-OS 11.2
- PAN-OS 11.2
- PAN-OS 11.1
- PAN-OS 11.0 (EoL)
- PAN-OS 10.2
- PAN-OS 10.1
- PAN-OS 10.0 (EoL)
- PAN-OS 9.1 (EoL)
- PAN-OS 9.0 (EoL)
- PAN-OS 8.1 (EoL)
- Cloud Management and AIOps for NGFW
End-of-Life (EoL)
External Dynamic List
An external dynamic list is a text file hosted on an external web server so that the firewall can
import objects—IP addresses, URLs, domains, International Mobile Equipment Identities
(IMEIs), International Mobile Subscriber Identities (IMSIs)—included in the list and
enforce policy. To enforce Security policy on entries included in an external dynamic
list, you must reference the list in a supported policy rule or profile. When multiple
lists are referenced, you can change the order in which the lists are evaluated to
ensure the most important external dynamic lists are committed before capacity limits
are reached. As you modify the list, the firewall dynamically imports the list at the
configured interval and enforces policy without requiring you to make a configuration
change or a commit on the firewall. If the web server is unreachable, the firewall uses
the last successfully retrieved list to enforce policy until the connection is restored
with the web server. In cases where authentication to the external dynamic list fails,
the Security policy stops enforcing the external dynamic list. To retrieve the external
dynamic list, the firewall uses the interface configured with the Palo Alto
Networks Services service route.
The firewall retains the last successfully retrieved external dynamic list and continues
operating with the most current external dynamic list information until connection is
restored with the server hosting the external dynamic list if:
- You upgrade or downgrade the firewall
- You reboot the firewall, management plane, or dataplane
- The server hosting the external dynamic list becomes unreachable
The following warning is displayed when the firewall is unable to connect or otherwise fetch the
most current external dynamic list information from the server.
Unable to fetch external list. Using old copy for refresh.
The firewall supports these types of external dynamic lists:
- Predefined IP Address—A predefined IP address list is a type of IP address list that refers to the built-in, dynamic IP lists with fixed or “predefined” contents. These built-in external dynamic lists—for bulletproof hosting providers, known malicious, and high-risk IP addresses—are automatically added to your firewall if you have an active Threat Prevention license. A predefined IP address list can also refer to an external dynamic list that uses one of the built-in lists as a source. Because you can’t modify the contents of a predefined list, you can use a predefined list as a source for a different external dynamic list if you want to add or exclude list entries.
- Predefined URL List—This type of external dynamic list contains prepopulated URLs that applications use for background services, such as updates or Certificate Revocation List (CRL) checks, that the firewall can safely exclude from your Authentication policy. Palo Alto Networks revises and maintains this type of external dynamic list, also known as an Authentication Portal Exclude List, through content updates.
- IP Address—The firewall typically enforces policy for a source or destination IP address defined as a static object on the firewall (see Enforce Policy on an External Dynamic List). If you need agility in enforcing policy for a list of source or destination IP addresses that emerge ad hoc, use this external dynamic list type as a source or destination address object in policy rules and configure the firewall to deny or allow access to the IP addresses (IPv4 and IPv6 address, IP range and IP subnets) in the list. You can also use an IP address external dynamic list in the source or destination of an SD-WAN policy rule. The firewall treats an external dynamic list of type IP address as an address object; all the IP addresses included in a list are handled as one address object.
- Domain—This type of external dynamic list allows you to import custom domain names into the firewall to enforce policy using an Anti-Spyware profile or SD-WAN policy rule. An external dynamic list in an Anti-Spyware profile is useful if you subscribe to third-party threat intelligence feeds and want to protect your network from new sources of threats or malware as soon as you learn of a malicious domain. For each domain you include in the external dynamic list, the firewall creates a custom DNS-based spyware signature so that you can enable DNS sinkholing. The DNS-based spyware signature is of type spyware with medium severity, and each signature is named Custom Malicious DNS Query <domain name>. You can also configure the firewall to include the subdomains of a specified domain. For example, if your domain list includes paloaltonetworks.com, all lower-level components of the domain name (for example, *.paloaltonetworks.com) will be included in the list. When this setting is enabled, each domain in a given list requires an additional entry, effectively doubling the number of entries used. For details on configuring domain lists, see Configure DNS Sinkholing for a Custom List of Domains.
- URL—This type of external dynamic list gives you the agility to protect your network from new sources of threat or malware. The firewall handles an external dynamic list with URLs like a custom URL category. You can use this list in two ways:
- As a match criterion in Security policy rules, decryption policy rules, and QoS policy rules to allow, deny, decrypt, not decrypt, or allocate bandwidth for the URLs in the custom category.
- In a URL Filtering profile where you can define more granular actions, such as continue, alert, or override, before attaching the profile to a Security policy rule (see Use an External Dynamic List in a URL Filtering Profile).
- Equipment Identity—You can reference an external dynamic list of IoT devices defined by International Mobile Equipment Identities (IMEIs) in a Security policy rule that controls traffic for equipment connected to a 5G or 4G network. Refer to the Mobile Network Infrastructure Getting Started for information about configuring Equipment ID security on supported firewall models.
- Subscriber Identity—You can reference an external dynamic list of International Mobile Subscriber Identities (IMSIs) in a Security policy rule that controls traffic for subscribers connected to a 5G or 4G network. Refer to the Mobile Network Infrastructure Getting Started for information about configuring Subscriber ID security on supported firewall models.
On each firewall model, you can add up to 30 custom external dynamic lists with unique sources
to enforce policy. The external
dynamic list limit does not apply to Panorama. When using Panorama to manage a firewall
that is enabled for multiple virtual systems, if you exceed the limit for the firewall,
a commit error displays on Panorama. A source is a URL that includes the IP address or
hostname, the path, and the filename for the external dynamic list. The firewall matches
the URL (complete string) to determine whether a source is unique.
While the firewall does not impose a limit on the number of lists of a specific type, it enforces
the following limits:
- IP address—The PA-3200 Series, PA-5200 Series, and PA-7000 Series firewalls support up to 150,000 total IP addresses; all other models support a maximum of 50,000 total IP addresses. No limits are enforced for the number of IP addresses per list. When the IP address limit is reached, the firewall generates a syslog message. The IP addresses in predefined IP address lists do not count toward the limit.
- URL and domain—The maximum number of URLs and domains supported varies by model. No limits are enforced for the number of URL or domain entries per list. Refer to the following table for specifics on your model:Model
URL List Entry Limits Domain List Entry Limits PA-5200 Series, PA-5400 Series, PA-7000 Series (upgraded with the PA-7000-20GXM-NPC, PA-7000-20GQXM-NPC, or the PA-7000 100G NPC). PA-7000 appliances with mixed NPCs only support the standard capacities.250,000 4,000,000 VM-500, VM-700100,0002,000,000 PA-400 Series (excepting the PA-410), PA-850, PA-820, PA-3200 Series, PA-3400 Series100,0001,000,000 PA-7000 Series (and appliances upgraded with the PA-7000 20GQ NPC or the PA-7000 20G NPC), VM-300100,000500,000 PA-220, PA-410, VM-50, VM-50 (Lite), VM-100, VM-1000-HV50,00050,000
List entries only count toward the firewall limits if they belong
to an external dynamic list that is referenced in policy.
- When parsing the list, the firewall skips entries that do not match the list type and ignores entries exceeding the maximum number supported for the model. To ensure that the entries do not exceed the limit, check the number of entries currently used in policy. Select ObjectsExternal Dynamic Lists and click List Capacities.
- An external dynamic list must contain entries. If you want to stop using the list, remove the reference from the policy rule or profile instead of leaving the list blank. If the list contains no entries, the firewall fails to refresh the list and continues to use the last information it retrieved.
- As a best practice, Palo Alto Networks recommends using shared external dynamic lists when multiple virtual systems are used. Using individual external dynamic lists with duplicate entries for each virtual system uses more memory, which might overutilize firewall resources.
- Entry counts in external dynamic lists on firewalls operating multivirtual systems are determined by considering additional factors, such as DAGs, the number of virtual systems, and rulebases. This approach generates a more accurate capacity consumption listing. However, a discrepancy in capacity usage might result after upgrading from PAN-OS 8.x releases.
- Depending on the features enabled on the firewall, memory usage limits might be exceeded before external dynamic list capacity limits are met due to memory allocation updates. As a best practice, Palo Alto Networks recommends reviewing external dynamic list capacities and, when necessary, removing or consolidating external dynamic lists into shared lists to minimize memory usage.