- A
show running nat-policy
Why wrong: This shows the NAT policy configuration, not current translations.
- B
show session all filter source 10.1.1.100
This command displays all active sessions from the specified source, including NAT source and destination translations.
- C
show nat rule
Why wrong: This command shows NAT policy rules, not active sessions or translations.
- D
show address 10.1.1.100
Why wrong: This is not a valid command; showing an address is not a standard CLI command on Palo Alto firewalls.
Question 366 of 516
How to Verify NAT Translation Using 'show session all filter' CLI Command
This PCNSE practice question tests your understanding of troubleshoot. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network administrator wants to verify if a specific internal IP address (10.1.1.100) is being translated to a public IP when accessing the internet. Which CLI command should be used?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
show session all filter source 10.1.1.100
Option B is correct because the 'show session all filter source 10.1.1.100' command displays active sessions in the firewall's session table, including the source IP, destination IP, and the translated (NAT) IP addresses. This allows the administrator to verify whether the internal IP 10.1.1.100 is being NATed to a public IP when accessing the internet, as the session table shows both the pre-NAT and post-NAT source addresses.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
show running nat-policy
Why it's wrong here
This shows the NAT policy configuration, not current translations.
- ✓
show session all filter source 10.1.1.100
Why this is correct
This command displays all active sessions from the specified source, including NAT source and destination translations.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
show nat rule
Why it's wrong here
This command shows NAT policy rules, not active sessions or translations.
- ✗
show address 10.1.1.100
Why it's wrong here
This is not a valid command; showing an address is not a standard CLI command on Palo Alto firewalls.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse viewing NAT policy configuration (which shows rules) with viewing active NAT translations (which requires session table inspection), leading them to pick 'show running nat-policy' instead of the session-based command.
Trap categories for this question
Command / output trap
This shows the NAT policy configuration, not current translations.
Detailed technical explanation
How to think about this question
The session table in Palo Alto Networks firewalls stores both the pre-NAT (original) and post-NAT (translated) IP addresses for each active flow, allowing verification of NAT behavior in real time. The 'show session all filter source' command filters sessions by source IP and can be combined with other filters like 'destination' or 'nat' to narrow down traffic. In a real-world scenario, if a user reports connectivity issues, this command helps confirm whether NAT is being applied correctly, especially when multiple NAT rules exist and the order of evaluation matters.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this PCNSE question test?
Troubleshoot — This question tests Troubleshoot — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: show session all filter source 10.1.1.100 — Option B is correct because the 'show session all filter source 10.1.1.100' command displays active sessions in the firewall's session table, including the source IP, destination IP, and the translated (NAT) IP addresses. This allows the administrator to verify whether the internal IP 10.1.1.100 is being NATed to a public IP when accessing the internet, as the session table shows both the pre-NAT and post-NAT source addresses.
What should I do if I get this PCNSE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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