Configure Service Routes
The following procedure enables you to configure service routes to change the
interface that the firewall uses to send requests to external services. For
firewalls in a high availability (HA) configuration, the
service route configuration is synchronized across the HA peers
For firewalls in an active/passive high availability (HA), the
service route you configured to leverage an external service or for log forwarding
sees activity only on the
active
HA peer while the
passive
HA peer sees no activity if you configured
an Ethernet interface as the Source Interface
. For example,
you configure a service route with Ethernet 1/3 as the source interface to forward
logs to Cortex Data Lake. In this scenario, all logs are forwarded from the
active
HA peer but no logs, including the system
and configuration logs, are forwarded from the passive
HA peer. However, if you configure the MGT interface as the service route
Source Interface
, activity occurs on both the
active
and passive
HA
peers.When set to default settings, certain
services (such as External Dynamic Lists and URL updates) use service
route settings that are inherited by a parent service (in this case,
Palo Alto Networks Services) if it is explicitly configured with
an interface. If the defaults are not used, Palo Alto Networks recommends
configuring each of the services that you use with an interface
to ensure that the proper service route is used.
- Customize service routes.
- Select (omit Global on a firewall without multiple virtual system capability), and in the Services Features section, clickService Route Configuration.
- SelectCustomizeand do one of the following to create a service route:
- For a predefined service:
- SelectIPv4orIPv6and 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, clickSet Selected Routes, and proceed to the next step.
- To limit the list for Source Address, select aSource Interface; then select aSource 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. SelectingAnySource Interface makes all IP addresses on all interfaces available in the Source Address list from which you select an address. SelectingUse defaultcauses 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 theSource Addressconfigured for theDestination. SelectingMGTcauses 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.
- ClickOKto 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:
- SelectDestinationandAddaDestinationIP address. In this case, if a packet arrives with a destination IP address that matches this configuredDestinationaddress, then the source IP address of the packet will be set to theSource Addressconfigured in the next step.
- To limit the list for Source Address, select aSource Interface; then select aSource Address(from that interface) as the service route. SelectingAnySource Interface makes all IP addresses on all interfaces available in the Source Address list from which you select an address. SelectingMGTcauses the firewall to use the MGT interface for the service route.
- ClickOKto save the setting.
- Repeat the prior steps for each service route you want to customize.
- ClickOKto save the service route configuration.
- Commit.
