Question 250
A FortiOS 7.6 team examines: A new guest VLAN must use internet SNAT while internal site-to-site traffic keeps private addresses. Select TWO complementary choices: the most appropriate corrective action AND the specific evidence confirming success.
Explanation
Correct Answers
For the observed situation (A new guest VLAN must use internet SNAT while internal site-to-site traffic keeps private addresses), the most specific acceptance evidence is: An external test endpoint sees the approved translated source address and the return connection succeeds. It validates the recommended response: Configure policy source NAT to translate approved private clients to the intended egress interface address where suitable. This addresses the documented risk: Without correct source translation and return routing, private-address internet sessions may fail despite an allow rule.
The reported FortiOS 7.6 condition is: A new guest VLAN must use internet SNAT while internal site-to-site traffic keeps private addresses. The targeted administrative response is: Configure policy source NAT to translate approved private clients to the intended egress interface address where suitable. The relevant failure risk is: Without correct source translation and return routing, private-address internet sessions may fail despite an allow rule. Validate with: An external test endpoint sees the approved translated source address and the return connection succeeds.
Incorrect Answers
Domain controller event collection for fsso (2.4) would demonstrate or implement: A controlled domain sign-in produces an appropriate collector event and current user mapping at the firewall. The case states: the most appropriate corrective action AND the specific evidence confirming success. The most direct paired action and test is: An external test endpoint sees the approved translated source address and the return connection succeeds.
Implicit deny and least privilege (2.1) addresses another technical failure: Adding a catch-all allow to solve one client error exposes unrelated source and destination paths. The required paired action and test concerns Interface-based source nat for outbound clients; a passing result for this alternative could leave that requirement unresolved.
Security profiles attached to permitted policies (2.1) would demonstrate or implement: Creating a web-filter or IPS profile alone offers no protection when the matched allow policy does not apply it. The paired-answer requirement concerns Interface-based source nat for outbound clients; this alternative does not provide the matching intervention and separate acceptance evidence.