JNCIA-SEC Srx Series Service Gateways Practice Question
You are configuring interface-based NAT on an SRX Series device. Packets exiting the external interface must have their source IP addresses translated to the IP address assigned to that egress interface. Which configuration statement achieves this?
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
✓
set security nat source rule-set RS rule R1 match source-address 192.168.1.0/24 then source-nat interface
Interface-based source NAT translates source IP addresses to the primary IP address of the egress interface using source nat interface.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
set security nat source rule-set RS rule R1 match source-address 0.0.0.0/0 then source-nat off
Why it's wrong here
This rule would turn off source NAT rather than applying interface-based NAT.
- ✗
set security nat source rule-set RS rule R1 then pool POOL-1
Why it's wrong here
Using a pool defines pool-based source NAT, not interface-based NAT.
- ✗
set security nat destination rule-set RDS rule RD1 then interface-nat
Why it's wrong here
Destination NAT does not use the interface-nat keyword in this format.
- ✓
set security nat source rule-set RS rule R1 match source-address 192.168.1.0/24 then source-nat interface
Why this is correct
The source-nat interface action translates traffic matching the rule to the primary IP address of the egress interface.
Visual reference
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This JNCIA-SEC question is part of Courseiva's 513-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 Juniper Networks exam blueprint
This JNCIA-SEC practice question is part of Courseiva's free Juniper 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 JNCIA-SEC exam.