GRE Tunnels
Table of Contents
Expand all | Collapse all
-
- Firewall Overview
- Features and Benefits
- Last Login Time and Failed Login Attempts
- Message of the Day
- Task Manager
- Language
- Alarms
- Commit Changes
- Save Candidate Configurations
- Revert Changes
- Lock Configurations
- Global Find
- Threat Details
- AutoFocus Intelligence Summary
- Configuration Table Export
- Change Boot Mode
-
- Objects > Addresses
- Objects > Address Groups
- Objects > Regions
- Objects > Dynamic User Groups
- Objects > Application Groups
- Objects > Application Filters
- Objects > Services
- Objects > Service Groups
- Objects > Devices
- Objects > External Dynamic Lists
- Objects > Custom Objects > Spyware/Vulnerability
- Objects > Custom Objects > URL Category
- Objects > Security Profiles > Antivirus
- Objects > Security Profiles > Anti-Spyware Profile
- Objects > Security Profiles > Vulnerability Protection
- Objects > Security Profiles > File Blocking
- Objects > Security Profiles > WildFire Analysis
- Objects > Security Profiles > Data Filtering
- Objects > Security Profiles > DoS Protection
- Objects > Security Profiles > Mobile Network Protection
- Objects > Security Profiles > SCTP Protection
- Objects > Security Profile Groups
- Objects > Log Forwarding
- Objects > Authentication
- Objects > Packet Broker Profile
- Objects > Schedules
-
-
- Firewall Interfaces Overview
- Common Building Blocks for Firewall Interfaces
- Common Building Blocks for PA-7000 Series Firewall Interfaces
- Tap Interface
- HA Interface
- Virtual Wire Interface
- Virtual Wire Subinterface
- PA-7000 Series Layer 2 Interface
- PA-7000 Series Layer 2 Subinterface
- PA-7000 Series Layer 3 Interface
- Layer 3 Interface
- Layer 3 Subinterface
- Log Card Interface
- Log Card Subinterface
- Decrypt Mirror Interface
- Aggregate Ethernet (AE) Interface Group
- Aggregate Ethernet (AE) Interface
- Network > Interfaces > VLAN
- Network > Interfaces > Loopback
- Network > Interfaces > Tunnel
- Network > Interfaces > SD-WAN
- Network > VLANs
- Network > Virtual Wires
-
- Network > Network Profiles > GlobalProtect IPSec Crypto
- Network > Network Profiles > IPSec Crypto
- Network > Network Profiles > IKE Crypto
- Network > Network Profiles > Monitor
- Network > Network Profiles > Interface Mgmt
- Network > Network Profiles > QoS
- Network > Network Profiles > LLDP Profile
- Network > Network Profiles > SD-WAN Interface Profile
-
-
- Device > Setup
- Device > Setup > Management
- Device > Setup > Interfaces
- Device > Setup > Telemetry
- Device > Setup > Content-ID
- Device > Setup > WildFire
- Device Setup Ace
- Device > Setup > DLP
- Device > Log Forwarding Card
- Device > Config Audit
- Device > Administrators
- Device > Admin Roles
- Device > Access Domain
- Device > Authentication Sequence
- Device > Device Quarantine
-
- Security Policy Match
- QoS Policy Match
- Authentication Policy Match
- Decryption/SSL Policy Match
- NAT Policy Match
- Policy Based Forwarding Policy Match
- DoS Policy Match
- Routing
- Test Wildfire
- Threat Vault
- Ping
- Trace Route
- Log Collector Connectivity
- External Dynamic List
- Update Server
- Test Cloud Logging Service Status
- Test Cloud GP Service Status
- Device > Virtual Systems
- Device > Shared Gateways
- Device > Certificate Management
- Device > Certificate Management > Certificate Profile
- Device > Certificate Management > OCSP Responder
- Device > Certificate Management > SSL/TLS Service Profile
- Device > Certificate Management > SCEP
- Device > Certificate Management > SSL Decryption Exclusion
- Device > Certificate Management > SSH Service Profile
- Device > Response Pages
- Device > Server Profiles
- Device > Server Profiles > SNMP Trap
- Device > Server Profiles > Syslog
- Device > Server Profiles > Email
- Device > Server Profiles > HTTP
- Device > Server Profiles > NetFlow
- Device > Server Profiles > RADIUS
- Device > Server Profiles > TACACS+
- Device > Server Profiles > LDAP
- Device > Server Profiles > Kerberos
- Device > Server Profiles > SAML Identity Provider
- Device > Server Profiles > DNS
- Device > Server Profiles > Multi Factor Authentication
- Device > Local User Database > Users
- Device > Local User Database > User Groups
- Device > Scheduled Log Export
- Device > Software
- Device > Dynamic Updates
- Device > Licenses
- Device > Support
- Device > Policy Recommendation > IoT
- Device > Policy > Recommendation SaaS
-
- Network > GlobalProtect > MDM
- Network > GlobalProtect > Clientless Apps
- Network > GlobalProtect > Clientless App Groups
- Objects > GlobalProtect > HIP Profiles
-
- Use the Panorama Web Interface
- Context Switch
- Panorama Commit Operations
- Defining Policies on Panorama
- Log Storage Partitions for a Panorama Virtual Appliance in Legacy Mode
- Panorama > Setup > Interfaces
- Panorama > High Availability
- Panorama > Administrators
- Panorama > Admin Roles
- Panorama > Access Domains
- Panorama > Device Groups
- Panorama > Plugins
- Panorama > Log Ingestion Profile
- Panorama > Log Settings
- Panorama > Server Profiles > SCP
- Panorama > Scheduled Config Export
- Panorama > Device Registration Auth Key
GRE Tunnels
Configure a logical, point-to-point tunnel to encapsulate
a payload protocol.
- Network > GRE Tunnels
First configure a tunnel interface (Network > Interfaces
> Tunnel). Then add a generic routing encapsulation (GRE)
Tunnel and provide the following information, referencing the tunnel
interface you created:
GRE Tunnel Fields | Description |
|---|---|
Name | Name of the GRE tunnel. |
Interface | Select the interface to use as the local GRE
tunnel endpoint (source interface), which is an Ethernet interface
or subinterface, an Aggregate Ethernet (AE) interface, a loopback interface,
or a VLAN interface. |
Local Address | Select the local IP address of the interface
to use as the tunnel interface address. |
Peer Address | Enter the IP address at the opposite end of
the GRE tunnel. |
Tunnel Interface | Select the Tunnel interface that you configured.
(This interface identifies the tunnel when it is the next hop for
routing.) |
TTL | Enter the TTL for the IP packet encapsulated
in the GRE packet (range is 1 to 255; default is 64). |
Copy ToS Header | Select to copy the Type of Service (ToS) field
from the inner IP header to the outer IP header of the encapsulated
packets to preserve the original ToS information. |
Keep Alive | Select to enable the Keep Alive function for
the GRE tunnel (disabled by default). If you enable Keep Alive,
by default it takes three unreturned keepalive packets (Retries)
at 10-second intervals for the GRE tunnel to go down, and it takes
five Hold Timer intervals at 10-second intervals for the GRE tunnel
to come back up. |
Interval (sec) | Set the interval between keepalive packets
that the local end of the GRE tunnel sends to the tunnel peer, and
the interval that each Hold Timer waits after successful keepalive
packets before the firewall re-establishes communication with the
tunnel peer (range is 1 to 50; default is 10). |
Retry | Set the number of intervals that keepalive
packets are not returned before the firewall considers the tunnel
peer to be down (range is 1 to 255; default is 3). |
Hold Timer | Set the number of intervals that keepalive
packets are successful before the firewall re-establishes communication
with the tunnel peer (range is 1 to 64; default is 5). |