Create Interfaces and Zones for GlobalProtect

You must configure the following interfaces and zones for your GlobalProtect infrastructure:
  • GlobalProtect portal—Requires a Layer 3 or loopback interface for the GlobalProtect clients’ connection. If the portal and gateway are on the same firewall, they can use the same interface. The portal must be in a zone that is accessible from outside your network, for example: DMZ.
  • GlobalProtect gateways—The interface and zone requirements for the gateway depend on whether the gateway you are configuring is external or internal, as follows:
    • External gateways—Requires a Layer 3 or loopback interface and a logical tunnel interface for the client to establish a VPN tunnel. The Layer 3/loopback interface must be in an external zone, such as DMZ. A tunnel interface can be in the same zone as the interface connecting to your internal resources (for example trust). For added security and better visibility, you can create a separate zone, such as corp-vpn. If you create a separate zone for your tunnel interface, you must create security policies that enable traffic to flow between the VPN zone and the trust zone.
    • Internal gateways—Requires a Layer 3 or loopback interface in your trust zone. You can also create a tunnel interface for access to your internal gateways, but this is not required.
For tips on how to use a loopback interface to provide access to GlobalProtect on different ports and addresses, refer to Can GlobalProtect Portal Page be Configured tobeAccessed on any Port?
For more information about portals and gateways, see About the GlobalProtect Components.
  1. Configure a Layer 3 interface for each portal and/or gateway you plan to deploy.
    If the gateway and portal are on the same firewall, you can use a single interface for both.
    As a best practice use static IP addresses for the portal and gateway.
    Do not attach an interface management profile that allows HTTP, HTTPS, Telnet, or SSH on the interface where you have configured a GlobalProtect portal or gateway because this enables access to your management interface from the Internet. Follow the Best Practices for Securing Administrative Access to ensure that you are securing administrative access to your firewalls in a way that will prevent successful attacks.
    1. Select NetworkInterfacesEthernet or NetworkInterfacesLoopback and then select the interface you want to configure for GlobalProtect. In this example, we are configuring ethernet1/1 as the portal interface.
    2. (Ethernet only) Select Layer3 from the Interface Type drop-down.
    3. On the Config tab, select the zone to which the portal or gateway interface belongs as follows:
      • Place portals and external gateways in an untrust zone for access by hosts outside your network, such as l3-untrust.
      • Place internal gateways in an internal zone, such as l3-trust.
      • If you have not yet created the zone, select New Zone from the Security Zone drop-down. In the Zone dialog, define a Name for the new zone and then click OK.
    4. In the Virtual Router drop-down, select default.
    5. To assign an IP address to the interface, select the IPv4 tab, click Add in the IP section, and enter the IP address and network mask to assign to the interface, for example 208.80.56.100/24.
    6. To save the interface configuration, click OK.
  2. On the firewall(s) hosting GlobalProtect gateway(s), configure the logical tunnel interface that will terminate VPN tunnels established by the GlobalProtect agents.
    IP addresses are not required on the tunnel interface unless you require dynamic routing. In addition, assigning an IP address to the tunnel interface can be useful for troubleshooting connectivity issues.
    Be sure to enable User-ID in the zone where the VPN tunnels terminate.
    1. Select NetworkInterfacesTunnel and click Add.
    2. In the Interface Name field, specify a numeric suffix, such as .2.
    3. On the Config tab, expand the Security Zone drop-down to define the zone as follows:
      • To use your trust zone as the termination point for the tunnel, select the zone from the drop-down.
      • (Recommended) To create a separate zone for VPN tunnel termination, click New Zone. In the Zone dialog, define a Name for new zone (for example, corp-vpn), select the Enable User Identification check box, and then click OK.
    4. In the Virtual Router drop-down, select None.
    5. (Optional) If you want to assign an IP address to the tunnel interface, select the IPv4 tab, click Add in the IP section, and enter the IP address and network mask to assign to the interface, for example 10.31.32.1/32.
    6. To save the interface configuration, click OK.
  3. If you created a separate zone for tunnel termination of VPN connections, create a security policy to enable traffic flow between the VPN zone and your trust zone.
    For example, the following policy rule enables traffic between the corp-vpn zone and the l3-trust zone.
    vpn-policy-example.png
  4. Save the configuration.

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