Palo Alto Networks Certified Cybersecurity Entry-level Technician (PCCET)Cybersecurity FundamentalsMedium
A network administrator is configuring a firewall to block all incoming traffic to a specific server, except for connections originating from a trusted internal network. Which type of firewall rule is being implemented to explicitly allow traffic from the trusted network while implicitly denying all others?
- AStateful Inspection
- BExplicit Allow
- CImplicit Deny
- DApplication Layer
Show answer & explanationAnswer & explanation
Correct answer: B. Explicit Allow
An 'explicit allow' rule is one that specifically permits certain traffic. When combined with an implicit deny (which is often the default or last rule), it ensures only desired connections are permitted.
Why the other options are wrong
- A. Stateful Inspection is a firewall capability, not a type of rule.
- C. Implicit Deny is the default 'deny all' rule, not the specific allow rule.
- D. Application Layer refers to a firewall's inspection capability, not a rule type.
Explicit Allow Rule
A firewall rule that specifically permits traffic that matches defined criteria, often used in conjunction with an implicit deny-all policy.
- Specifically grants access.
- Overrides implicit deny rules.
- Crucial for controlled network access.
Memory trick: Rules are either explicitly allowed or implicitly denied.