Configure Session Timeouts
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Next-Generation Firewall Docs
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PAN-OS 9.1 (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
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- Commit, Validate, and Preview Firewall Configuration Changes
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- Define Access to the Web Interface Tabs
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- Define User Privacy Settings in the Admin Role Profile
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- Panorama Web Interface Access Privileges
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- Reset the Firewall to Factory Default Settings
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- Plan Your Authentication Deployment
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- Keys and 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
- 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
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- Configure Syslog Monitoring
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- Traffic Log Fields
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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
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- Apply Tags to an Application Filter
- Create Custom Application Tags
- Workflow to Best Incorporate New and Modified App-IDs
- See the New and Modified App-IDs in a Content Release
- See How New and Modified App-IDs Impact Your Security Policy
- Ensure Critical New App-IDs are Allowed
- Monitor New App-IDs
- Disable and Enable App-IDs
- Safely Enable Applications on Default Ports
- Applications with Implicit Support
- Application Level Gateways
- Disable the SIP Application-level Gateway (ALG)
- Maintain Custom Timeouts for Data Center Applications
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- Best Practices for Securing Your Network from Layer 4 and Layer 7 Evasions
- Set Up Antivirus, Anti-Spyware, and Vulnerability Protection
- Set Up File Blocking
- Prevent Brute Force Attacks
- Customize the Action and Trigger Conditions for a Brute Force Signature
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- Decryption Overview
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- Keys and Certificates for Decryption Policies
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- Perfect Forward Secrecy (PFS) Support for SSL Decryption
- SSL Decryption and Subject Alternative Names (SANs)
- High Availability Support 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
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- How Decryption Broker Works
- Layer 3 Security Chain Guidelines
- Configure Decryption Broker with One or More Layer 3 Security Chain
- Transparent Bridge Security Chain Guidelines
- Configure Decryption Broker with a Single Transparent Bridge Security Chain
- Configure Decryption Broker with Multiple Transparent Bridge Security Chains
- Activate Free Licenses for Decryption Features
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- About Palo Alto Networks URL Filtering Solution
- How Advanced URL Filtering Works
- URL Filtering Use Cases
- Plan Your URL Filtering Deployment
- URL Filtering Best Practices
- Activate The Advanced URL Filtering Subscription
- Configure URL Filtering
- Test URL Filtering Configuration
- Log Only the Page a User Visits
- Create a Custom URL Category
- URL Category Exceptions
- Use an External Dynamic List in a URL Filtering Profile
- Allow Password Access to Certain Sites
- URL Filtering Response Pages
- Customize the URL Filtering Response Pages
- HTTP Header Logging
- Request to Change the Category for a URL
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- Tap Interfaces
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- Layer 2 and Layer 3 Packets over a Virtual Wire
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- Configure Virtual Wires
- Configure an Aggregate Interface Group
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- Virtual Routers
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- RIP
- Route Redistribution
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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
- Dynamic DNS Overview
- Configure Dynamic DNS for Firewall Interfaces
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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)
- 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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- 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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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
-
- NAT Rule Capacities
- Dynamic IP and Port NAT Oversubscription
- Dataplane NAT Memory Statistics
-
- 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
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- Create OSPF Routing Profiles
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- 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)
Configure Session Timeouts
A session timeout defines the duration of
time for which PAN-OS maintains a session on the firewall after
inactivity in the session. By default, when the session timeout
for the protocol expires, PAN-OS closes the session. You can define
a number of timeouts for TCP, UDP, and ICMP sessions in particular.
The Default timeout applies to any other type of session. The timeouts
are global, meaning they apply to all of the sessions of that type
on the firewall.
You can also configure a global ARP cache
timeout setting, which controls how long the firewall keeps ARP
entries (IP address-to-hardware addresses mappings) in its cache.
In
addition to the global settings, you can define timeouts for an
individual application in the ObjectsApplications tab. The firewall
applies application timeouts to an application that is in established
state. When configured, timeouts for an application override the
global TCP or UDP session timeouts.
If
you change the TCP or UDP timers at the application level, these
timers for predefined applications and shared custom applications
will be implemented across all virtual systems. If you need an application’s
timers to be different for a virtual system, you must create a custom
application, assign it unique timers, and then assign the custom
application to a unique virtual system.
Perform the
following task if you need to change default values of the global
session timeout settings for TCP, UDP, ICMP, Captive Portal authentication,
or other types of sessions. All values are in seconds.
The
defaults are optimal values. However, you can modify these according
to your network needs. Setting a value too low could cause sensitivity
to minor network delays and could result in a failure to establish
connections with the firewall. Setting a value too high could delay
failure detection.
- Access the session timeouts.Select DeviceSetupSession and edit the Session Timeouts.
- (Optional)
Change miscellaneous timeouts.
- Default—Maximum length of time that a non-TCP/UDP or non-ICMP session can be open without a response (range is 1 to 15,999,999; default is 30).
- Discard Default—Maximum length of time that a non-TCP/UDP session remains open after PAN-OS denies a session based on security policies configured on the firewall (range is 1 to 15,999,999; default is 60).
- Scan—Maximum length of time that any session remains open after it is considered inactive; an application is regarded as inactive when it exceeds the application trickling threshold defined for the application (range is 5 to 30; default is 10).
- Captive Portal—Authentication session timeout for the Captive Portal web form. To access the requested content, the user must enter the authentication credentials in this form and be successfully authenticated (range is 1 to 15,999,999; default is 30).
- To define other Captive Portal timeouts, such as the idle timer and the expiration time before the user must be re-authenticated, select DeviceUser IdentificationCaptive Portal Settings. See Configure Captive Portal.
- (Optional) Change TCP timeouts.
- Discard TCP—Maximum length of time that a TCP session remains open after it is denied based on a security policy configured on the firewall. Default: 90. Range: 1 to 15,999,999.
- TCP—Maximum length of time that a TCP session remains open without a response, after a TCP session is in the Established state (after the handshake is complete and/or data is being transmitted). Default: 3,600. Range: 1 to 15,999,999.
- TCP Handshake—Maximum length of time permitted between receiving the SYN-ACK and the subsequent ACK to fully establish the session. Default: 10. Range: 1 to 60.
- TCP init—Maximum length of time permitted between receiving the SYN and SYN-ACK prior to starting the TCP handshake timer. Default: 5. Range: 1 to 60.
- TCP Half Closed—Maximum length of time between receiving the first FIN and receiving the second FIN or a RST. Default: 120. Range: 1 to 604,800.
- TCP Time Wait—Maximum length of time after receiving the second FIN or a RST. Default: 15. Range: 1 to 600.
- Unverified RST—Maximum length of time after receiving a RST that cannot be verified (the RST is within the TCP window but has an unexpected sequence number, or the RST is from an asymmetric path). Default: 30. Range: 1 to 600.
- See also the Scan timeout in the section (Optional) Change miscellaneous timeouts.
- (Optional) Change UDP timeouts.
- Discard UDP—Maximum length of time that a UDP session remains open after it is denied based on a security policy configured on the firewall. Default: 60. Range: 1 to 15,999,999.
- UDP—Maximum length of time that a UDP session remains open without a UDP response. Default: 30. Range: 1 to 15,999,999.
- See also the Scan timeout in the section (Optional) Change miscellaneous timeouts.
- (Optional) Change ICMP timeouts.
- ICMP—Maximum length of time that an ICMP session can be open without an ICMP response. Default: 6. Range: 1 to 15,999,999.
- See also the Discard Default and Scan timeout
in the section (Optional) Change miscellaneous timeouts.
- Click OK and Commit.
- (Optional) Change the ARP cache timeout.
- Access the CLI and specify how many seconds
the firewall keeps ARP entries in its cache. Use the operational
command set system setting arp-cache-timeout <value>,
where the range is 60 to 65,535; default is 1,800.If you decrease the timeout and existing entries in the cache have a TTL greater than the new timeout, the firewall removes those entries and refreshes the ARP cache. If you increase the timeout and existing entries have a TTL less than the new timeout, they expire according to the TTL and the firewall caches new entires with the larger timeout value.
- View the ARP cache timeout setting with the operational CLI command show system setting arp-cache-timeout.
- Access the CLI and specify how many seconds
the firewall keeps ARP entries in its cache. Use the operational
command set system setting arp-cache-timeout <value>,
where the range is 60 to 65,535; default is 1,800.