Tunnel Content Inspection
Table of Contents
Expand all | Collapse all
-
- Tap Interfaces
-
- 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 an Aggregate Interface Group
- Configure Bonjour Reflector for Network Segmentation
- Use Interface Management Profiles to Restrict Access
-
- 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)
- 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
-
- 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
-
- 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
- Create Multicast Routing Profiles
- Create an IPv4 MRoute
Tunnel Content Inspection
The firewall can inspect the traffic content of cleartext
tunnel protocols without terminating the tunnel:
- Non-encrypted IPSec traffic [NULL Encryption Algorithm for IPSec (RFC 2410) and transport mode AH IPSec]
- General Packet Radio Service (GPRS) Tunneling Protocol for User Data (GTP-U)
- Virtual Extensible Local Area Network (VXLAN) (RFC 7348)
Tunnel content inspection is for cleartext tunnels, not
for VPN or LSVPN tunnels, which carry encrypted traffic.
You can use tunnel content inspection to enforce Security, DoS
Protection, and QoS policies on traffic in these types of tunnels
and traffic nested within another cleartext tunnel (for example,
a Null Encrypted IPSec tunnel inside a GRE tunnel). You can view
tunnel inspection logs and tunnel activity in the ACC to verify
that tunneled traffic complies with your corporate security and
usage policies.
All firewall models support tunnel content inspection for GRE,
non-encrypted IPSec, and VXLAN protocols. Only firewalls that support GTP security support
GTP-U tunnel content inspection—see the PAN-OS Releases by Model
that Support GTP and SCTP Security in the Compatibility Matrix.
By default, supported firewalls perform tunnel acceleration to
improve performance and throughput for traffic going through GRE
tunnels, VXLAN tunnels, and GTP-U tunnels. Tunnel acceleration provides
hardware offloading to reduce the time it takes to perform flow
lookups and allows the tunnel traffic to be distributed more efficiently
based on the inner traffic. However, you can Disable Tunnel Acceleration to troubleshoot.