I am troubleshooting Cisco phone registration issues through a 3020 running 7.1.7 . My rulesets are only service based (TCP/UDP 5060, 5061, etc) and allow any application. Cisco TAC is telling me that ALG issues are interfering with registration.
If I am allowing any application and using services only (and the traffic is hitting these rules), is SIP inspection or ALG still being applied to the traffic?
Yes by default Palo Alto always identifies application.
You can either disable ALG or play around with application override. In this case Palo Alto will stop at Layer 4 and you can manually specify what application Palo should identify this traffic as.
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