Cybersecurity-Apprentice Network Security Practice Question
An administrator is troubleshooting a scenario where internal clients cannot establish connections to a newly published public web server hosted behind the firewall using its public NAT IP. What common firewall misconfiguration causes this behavior?
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
✓
Failure to configure NAT Loopback (or hairpin NAT) when internal clients access public IPs of internal servers.
Destination NAT without configuring a corresponding Source NAT (or NAT loopback/reflection) causes asymmetric or failing routing when internal clients try to reach external IPs of internal servers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Failure to configure NAT Loopback (or hairpin NAT) when internal clients access public IPs of internal servers.
Why this is correct
NAT Loopback is required when internal clients access internal servers via their external public NAT IP.
- ✗
Missing User-ID mapping for the internal client IP addresses.
Why it's wrong here
User-ID maps users to IPs, but DNAT/SNAT routing handles server reachability.
- ✗
Incorrect configuration of the GlobalProtect Portal external gateway address.
Why it's wrong here
GlobalProtect settings do not impact internal web server routing.
- ✗
Attaching an incorrect WildFire analysis profile to the security rule.
Why it's wrong here
WildFire profiles deal with malware analysis, not IP routing or NAT.
Visual reference
Quick reference
Asymmetric Encryption Algorithm Comparison
| Algorithm | Key Exchange | Signatures | Equivalent Security Key | Notes |
|---|---|---|---|---|
| RSA-3072 | Yes | Yes | 128-bit | Widely deployed; slow for bulk data |
| ECDSA P-256 | No | Yes | 128-bit | Fast signatures; standard TLS certs |
| ECDH / ECDHE | Yes | No | 128-bit | Perfect forward secrecy in TLS 1.3 |
| DH / DHE | Yes | No | 128-bit (3072-bit key) | Replaced by ECDHE in modern TLS |
| Ed25519 | No | Yes | ~128-bit | SSH keys, modern PKI |
About these practice questions
This Cybersecurity-Apprentice question is part of Courseiva's 177-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Palo Alto Networks exam blueprint
This Cybersecurity-Apprentice practice question is part of Courseiva's free Palo Alto Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the Cybersecurity-Apprentice exam.