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A Firewall Engineer is migrating a legacy firewall to a Palo Alto Networks firewall in order to use features like App-ID and SSL decryption. Which order of steps is best to complete this migration?
A.
First migrate SSH rules to App-ID; then implement SSL decryption.
B.
Configure SSL decryption without migrating port-based security rules to App-ID rules.
C.
First implement SSL decryption; then migrate port-based rules to App-ID rules.
D.
First migrate port-based rules to App-ID rules; then implement SSL decryption.
Definitely D. The link provided by some, pay close attention to this specific line (and the non-standard port part):
"...Security policy rules are likely to use application default ports to prevent traffic from using non-standard ports."
Granted you could account for non-default ports just fine beforehand too but test is on PAN BPs so D
Migrate from port-based to application-based Security policy rules before you create and deploy Decryption policy rules.
https://docs.paloaltonetworks.com/best-practices/9-1/decryption-best-practices/decryption-best-practices/plan-ssl-decryption-best-practice-deployment
Putting C as a protest vote. That best practice statement is stupid from Palo. As if an engineer would forget which ports he configured in a few decryption rules and couldn't easily look at them. I'd want my App-ID visibility right off the bat - granular App-IDs won't work without decryption.
https://docs.paloaltonetworks.com/best-practices/10-2/decryption-best-practices/decryption-best-practices/plan-ssl-decryption-best-practice-deployment
"Migrating to App-ID based rules before deploying decryption ensures that when you test your decryption deployment"
D is correct. Migrate from port-based to applicaon-based Security policy rules before you create and
deploy Decrypon policy rules. If you create Decrypon rules based on port-based Security
policy and then migrate to applicaon-based Security policy, the change could cause the
Decrypon rules to block traffic that you intend to allow because Security policy rules are
likely to use applicaon default ports to prevent traffic from using non-standard ports.
Migrang to App-ID based rules before deploying decrypon ensures that when you test
your decrypon deployment, you’ll discover Security policy misconfiguraons and fix them
before rolling decrypon out to the general user populaon.
Can you post the link where you got your information ?
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