RADIUS Authentication Failing

• Authentication failure when trying to login
• Error message "No service source route is set" seen in authd.log

> tail follow yes mp-log authd.log 

Egress: No service source route is set, might use destination source route if configured
Authentication to RADIUS server at 10.10.10.100:1645 for user "user"

• PA-VM-300
• PAN-OS
• RADIUS Authentication
• Using Dataplane interface for management

• By default RADIUS authentication uses the MGT interface

• Change the Service Route for RADIUS authentication from Default to the interface used for management.

1. Device > Setup > Services tab
2. Under Services Features select "Service Route Configuration"
3. Click Customize
4. Click RADIUS
5. Select Source Interface used for Management (Source Address should auto-populate)
6. Click OK twice.
7. Commit

• Creating a Service Route to use a dataplane interface