NGFW-Engineer PAN OS Networking Configuration Practice Question
In a Site-to-Site VPN, which setting determines how the firewall handles traffic that does not match the phase 2 selector?
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
✓
Proxy ID
The Proxy ID configuration in the IKE Gateway/IPsec tunnel settings defines exactly which traffic (source/destination/protocol) is permitted through the tunnel; unmatched traffic is dropped or routed outside the tunnel.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Proxy ID
Why this is correct
Proxy IDs specify the tunnel traffic flow.
- ✗
Re-key interval
Why it's wrong here
Re-key handles session renewal timing.
- ✗
Dead Peer Detection
Why it's wrong here
DPD checks if the peer is alive.
- ✗
IKE Crypto Profile
Why it's wrong here
Crypto profiles define encryption/hashing.
Quick reference
VPN Protocol Comparison
| Protocol | Port | Encryption | Authentication | Use Case |
|---|---|---|---|---|
| IKEv2 / IPsec | UDP 500 / 4500 | AES-256 | Certificates / PSK | Site-to-site & remote access |
| SSL / TLS VPN | TCP 443 | TLS 1.3 | Certificates / MFA | Clientless remote access |
| L2TP / IPsec | UDP 1701 | AES (IPsec) | PSK / Certificates | Legacy remote access |
| WireGuard | UDP 51820 | ChaCha20 | Public keys | Modern high-performance VPN |
| PPTP | TCP 1723 | MPPE (weak) | MS-CHAPv2 | Legacy — avoid in production |
PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.
About these practice questions
One of 190 original NGFW-Engineer practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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 NGFW-Engineer 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 NGFW-Engineer exam.