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Exam PCNSE topic 1 question 606 discussion

Actual exam question from Palo Alto Networks's PCNSE
Question #: 606
Topic #: 1
[All PCNSE Questions]

A firewall engineer creates a source NAT rule to allow the company’s internal private network 10.0.0.0/23 to access the internet. However, for security reasons, one server in that subnet (10.0.0.10/32) should not be allowed to access the internet, and therefore should not be translated with the NAT rule.

Which set of steps should the engineer take to accomplish this objective?

  • A. 1. Create a NAT rule (NAT-Rule-1) and set the source address in the original packet to 10.0.0.10/32.
    2. Check the box for negate option to negate this IP from the NAT translation.
  • B. 1. Create a NAT rule (NAT-Rule-1) and set the source address in the original packet to 10.0.0.0/23.
    2. Check the box for negate option to negate this IP subnet from NAT translation.
  • C. 1. Create a source NAT rule (NAT-Rule-1) to translate 10.0.0/23 with source address translation set to dynamic IP and port.
    2. Create another NAT rule (NAT-Rule-2) with source IP address in the original packet set to 10.0.0.10/32 and source translation set to none.
    3. Place (NAT-Rule-2) above (NAT-Rule-1).
  • D. 1. Create a source NAT rule (NAT-Rule-1) to translate 10.0.0/23 with source address translation set to dynamic IP and port.
    2. Create another NAT rule (NAT-Rule-2) with source IP address in the original packet set to 10.0.0.10/32 and source translation set to none.
    3. Place (NAT-Rule-1) above (NAT-Rule-2).
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️

Comments

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krzyb
3 months, 1 week ago
None of the answers is correct. A & B talks about the "negate" option which is not available for NAT rules. C & D refers to invalid subnet 10.0.0/23 (only 3 octets). With a source like this, you cannot even save the rule. "We will not check your knowledge, we will make you confused" type of question.
upvoted 1 times
DatITGuyTho1337
2 months, 2 weeks ago
Might have been a typo, to be fair.
upvoted 1 times
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redgi0
4 months, 2 weeks ago
Selected Answer: C
above indeed
upvoted 1 times
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this was in my exam 09/08/2024
upvoted 1 times
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scanossa
5 months, 4 weeks ago
This question was on my exam on July 23rd, 2024
upvoted 1 times
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[Removed]
6 months, 3 weeks ago
So block the traffic to internet with security policy...
upvoted 2 times
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Cro13
7 months, 2 weeks ago
Selected Answer: C
C is correct because NAT-Rule-2 need to be above NAT-Rule-1
upvoted 1 times
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DatITGuyTho1337
9 months, 3 weeks ago
Agreed with everyone who answered C!
upvoted 1 times
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jaypogi16
9 months, 3 weeks ago
Selected Answer: C
NAT Rule 2 will never get use if it will place under NAT rule 1
upvoted 2 times
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b53fdf1
9 months, 3 weeks ago
Selected Answer: C
NAT-Rule-2 needs to be above NAT-Rule-1 or else Rule 1 will shadow Rule 2 and Rule 2 will never get used.
upvoted 3 times
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Thunnu
9 months, 3 weeks ago
C should be the right answer
upvoted 4 times
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