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Exam PCNSE topic 1 question 604 discussion

Actual exam question from Palo Alto Networks's PCNSE
Question #: 604
Topic #: 1
[All PCNSE Questions]

A firewall engineer has determined that, in an application developed by the company’s internal team, sessions often remain idle for hours before the client and server exchange any data. The application is also currently identified as unknown-tcp by the firewalls. It is determined that because of a high level of trust, the application does not require to be scanned for threats, but it needs to be properly identified in Traffic logs for reporting purposes.

Which solution will take the least time to implement and will ensure the App-ID engine is used to identify the application?

  • A. Create a custom application with specific timeouts and signatures based on patterns discovered in packet captures.
  • B. Access the Palo Alto Networks website and complete the online form to request that a new application be added to App-ID.
  • C. Create a custom application with specific timeouts, then create an application override rule and reference the custom application.
  • D. Access the Palo Alto Networks website and raise a support request through the Customer Support Portal.
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
by hcir at March 30, 2024, 8:46 a.m.

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Reyad789
Highly Voted 1 year ago
The answer is A, because in the question they mentioned that the App-ID process must be preformed. Application override policies skip the App-ID process.
upvoted 9 times
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hcir
Highly Voted 1 year ago
A is the answer. If it was a commercial application, B would be the answer. But because it is an internal application, creating a custom app is the way to go.
upvoted 7 times
Thunnu
1 year ago
why not C?
upvoted 2 times
Djeep12345
1 year ago
I will go with C
upvoted 1 times
DatITGuyTho1337
1 year ago
Going with C means that the FW will stop using the App-ID engine because of the application override policy rule. A is the answer.
upvoted 3 times
Thunnu
1 year ago
Yes we don't require the layer 4 to 7 scans. As the question itself mentioned not required to be scanned for threats.
upvoted 6 times
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hcir
1 year ago
A requirement is to be able to properly identify the application in the logs and reporting. With app-override, no application is identified, only TCP or UDP.
upvoted 5 times
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TeachTrooper
Most Recent 2 months, 1 week ago
Selected Answer: A
custom apps will not be identified by App-ID unless signature is there. yes it says "least time" but if you go with C, APP-ID will not identify the app... so yeah it may take a bit more time to capture packet in order to find out signature however it is the only answer for the requirement "will be identified by app-id"
upvoted 1 times
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Yohinar
5 months, 3 weeks ago
Selected Answer: C
Usually you would go with answer A, however the question states that layer 4-7 scanning is not wanted - hence answer C is correct.
upvoted 2 times
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Bbb78
5 months, 3 weeks ago
Selected Answer: C
c - "overide" the inspection based on the custom application
upvoted 1 times
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362c603
6 months, 2 weeks ago
Selected Answer: C
Application Override policies bypass layer 7 processing and threat inspectio https://docs.paloaltonetworks.com/pan-os/11-0/pan-os-admin/policy/application-override-policy
upvoted 2 times
DatITGuyTho1337
6 months ago
"...Application Override policies prevent the firewall from performing *layer 7 application identification* and layer 7 threat inspection and prevention..." The above via the same link provided, how can your answer be C???
upvoted 2 times
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redgi0
7 months, 3 weeks ago
Selected Answer: A
I go with A C is not going to use APP-ID
upvoted 3 times
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0d2fdfa
10 months, 3 weeks ago
Selected Answer: C
Correct Answer is C https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClVLCA0 Example Use Scenario You might ask why we'd ever need to override the normal application identification process. In some cases, customers build their own custom applications to address specific needs unique to the company. For these applications, we may not have signatures to properly identify the expected behavior and identify the traffic with a known application. In such cases, we recommended creating an application override to allow easier identification and reporting, and to prevent confusion.
upvoted 5 times
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PacketsDownRange99
1 year ago
Selected Answer: A
Agree with the rest. A
upvoted 1 times
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VenomX51
1 year ago
Selected Answer: A
"...and will ensure the App-ID engine is used to identify the application" - This requires a signature. If you just create a custom app based on port and protocol, it's not using the App-ID engine to identify the app, and any traffic that matches that same port/protocol/source/destination will be identified as the custom app.
upvoted 1 times
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JustWondering
1 year ago
Selected Answer: C
C is the correct answer. It does not say AppID needs to be done. It states that Traffic Logs need to see the application. The question asks about the the LEAST time to implement. Answer A requires packet captures.
upvoted 2 times
DatITGuyTho1337
6 months ago
"Which solution will take the least time to implement and will ensure the App-ID engine is used to identify the application?" The above being the last line of the question itself. : /
upvoted 1 times
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tonykolo
1 year ago
Selected Answer: A
A -Creating a custom app takes less time time to implement than waiting for PA to create an app-ID. You don't need an app-override either.
upvoted 1 times
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rhinogkn24
1 year ago
Also C will take "less time" since no packet capture is required.
upvoted 1 times
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rhinogkn24
1 year ago
Selected Answer: C
When you create a custom app (with no signature) the custom app name referenced in the Sec Policy Rule will also be used to ID the custom app name in the traffic logs. Therefore properly identified per the reporting requirements.
upvoted 3 times
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k3rnelpanicpj
1 year ago
Selected Answer: A
A is correct
upvoted 1 times
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C (25%)
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