Use Case: Non-IP Protocol Protection Within a Security Zone on Layer 2 Interfaces
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PAN-OS 9.1 (EoL)
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- Prerequisites for Active/Active HA
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- Use Case: Configure Active/Active HA with Route-Based Redundancy
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- About Palo Alto Networks URL Filtering Solution
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- Tap Interfaces
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- Layer 2 and Layer 3 Packets over a Virtual Wire
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- DNS Overview
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- NAT Rule Capacities
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- Translate Internal Client IP Addresses to Your Public IP Address (Source DIPP NAT)
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- Policy Types
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- External Dynamic List
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PAN-OS 11.1 & Later
- PAN-OS 11.1 & Later
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- PAN-OS 10.2
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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
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- Zone Protection for a Virtual Wire Interface
- VLAN-Tagged Traffic
- Virtual Wire Subinterfaces
- Configure Virtual Wires
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- DHCP Overview
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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
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PAN-OS 11.2
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- PAN-OS 8.1 (EoL)
- Cloud Management and AIOps for NGFW
End-of-Life (EoL)
Use Case: Non-IP Protocol Protection Within a Security Zone on Layer 2 Interfaces
If you don’t implement a Zone Protection profile
with non-IP protocol protection, the firewall allows non-IP protocols
in a single zone to go from one Layer 2 interface to another. In
this use case, blocking LLDP packets ensures that LLDP for one network
doesn’t discover a network reachable through another interface in
the zone.
In the following figure, the Layer 2 VLAN named
Datacenter is divided into two subinterfaces: 192.168.1.1/24, subinterface
.7 and 192.168.1.2/24, subinterface .8. The VLAN belongs to the
User zone. By applying a Zone Protection profile that blocks LLDP
to the User zone:
- Subinterface .7 blocks LLDP from its switch to the firewall at the red X on the left, preventing that traffic from reaching subinterface .8.
- Subinterface .8 blocks LLDP from its switch to the firewall at the red X on the right, preventing that traffic from reaching subinterface .7.
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- Create a subinterface for an Ethernet interface.
- Select NetworkInterfacesEthernet and select a Layer 2 interface, in this example, ethernet1/1.
- Select Add Subinterfaces.
- The Interface Name defaults to the interface (ethernet 1/1). After the period, enter 7.
- For Tag, enter 300.
- For Security Zone, select User.
- Click OK.
- Create a second subinterface for the Ethernet interface.
- Select NetworkInterfacesEthernet and select the Layer 2 interface: ethernet1/1.
- Select Add Subinterfaces.
- The Interface Name defaults to the interface (ethernet 1/1). After the period, enter 8.
- For Tag, enter 400.
- For Security Zone, select User.
- Click OK.
- Create a VLAN for the Layer2 interface and two subinterfaces.
- Select NetworkVLANs and Add a VLAN.
- Enter the Name of the VLAN; for this example, enter Datacenter.
- For VLAN Interface, select None.
- For Interfaces, click Add and select the Layer 2 interface: ethernet1/1, and two subinterfaces: ethernet1/1.7 and ethernet1/1.8.
- Click OK.
- Block non-IP protocol packets in a Zone Protection profile.
- Select NetworkNetwork ProfilesZone Protection and Add a profile.
- Enter the Name, in this example, Block LLDP.
- Enter a profile Description—Block LLDP packets from an LLDP network to other interfaces in the zone (intrazone).
- Select Protocol Protection.
- Choose Rule Type of Exclude List.
- Enter Protocol Name LLDP.
- Enter Ethertype code 0x88cc. The Ethertype must be preceded by 0x to indicate a hexadecimal value.
- Select Enable.
- Click OK.
- Apply the Zone Protection profile to the security zone
to which Layer 2 VLAN belongs.
- Select NetworkZones.
- Add a zone.
- Enter the Name of the zone, User.
- For Location, select the virtual system where the zone applies.
- For Type, select Layer2.
- Add an Interface that belongs to the zone, ethernet1/1.7
- Add an Interface that belongs to the zone, ethernet1/1.8.
- For Zone Protection Profile, select the profile Block LLDP.
- Click OK.
- Commit.Click Commit.
- View the number of non-IP packets the firewall has dropped based
on protocol protection.
> show counter global name pkt_nonip_pkt_drop > show counter global name pkt_nonip_pkt_drop delta yes