Configure Service Routes (PAN-OS)

1. Configure service routes.

   1. Select DeviceSetupServicesGlobal (omit Global on a firewall without multiple virtual system capability), and in the Services Features section, click Service Route Configuration.
   2. To force all firewall service communication with external servers through the management (MGT) interface, select Use Management Interface for all and click OK.

      When a service request originates from a firewall that has IPv6 enabled and has both IPv4 and IPv6 configured, the firewall behaves as a dual-stack host. Consequently, if the DNS resolution returns an IPv6 address as the first result, the firewall attempts to use that as the destination address.

      Additionally, in cases where the management interface is configured with only an IPv4 address and lacks a valid IPv6 configuration, if the DNS resolution returns an IPv6 address as the first result, the firewall doesn't Use Management Interface for all (which would be an IPv4 address). The firewall instead uses a dataplane IPv6 interface address as the source for the service request. Thus the service route has an IPv6 address at each end of the route.
   3. As an alternative to using the MGT interface, select Customize and do one of the following to create a service route:

      • For a predefined service:
        • Select IPv4 or IPv6 and click the link for the service for which you want customize the service route.

          To easily use the same source address for multiple services, select the checkbox for the services, click Set Selected Routes, and proceed to the next step.
        • To limit the list for Source Address, select a Source Interface; then select a Source Address (from that interface) as the service route. An Address Object can also be referenced as a Source Address if it is already configured on the selected interface. Selecting Any Source Interface makes all IP addresses on all interfaces available in the Source Address list from which you select an address. Selecting Use default causes the firewall to use the management interface for the service route, unless the packet destination IP address matches the configured Destination IP address, in which case the source IP address is set to the Source Address configured for the Destination. Selecting MGT causes the firewall to use the MGT interface for the service route, regardless of any destination service route.
          The Service Route Source Address does not inherit configuration changes from the referenced interface and vice versa. Modification of an Interface IP Address to a different IP address or Address Object will not update a corresponding Service Route Source Address. This may lead to commit failure and require you to update the Service Route(s) to a valid Source Address value.
        • Click OK to save the setting.
        • Repeat this step if you want to specify both an IPv4 and IPv6 address for a service.
      • For a destination service route:
        • Select Destination and Add a Destination IP address. In this case, if a packet arrives with a destination IP address that matches this configured Destination address, then the source IP address of the packet will be set to the Source Address configured in the next step.
        • To limit the list for Source Address, select a Source Interface; then select a Source Address (from that interface) as the service route. Selecting Any Source Interface makes all IP addresses on all interfaces available in the Source Address list from which you select an address. Selecting MGT causes the firewall to use the MGT interface for the service route.
        • Click OK to save the setting.
   4. Repeat the prior steps for each service route you want to customize.
   5. Click OK to save the service route configuration.
2. Commit.