NETSEC-GENERALIST Question #50: Real Exam Question with Answer & Explanation

The correct answer is A: Pinhole. When a firewall acts as an Application-Level Gateway (ALG), it inspects and manages traffic at the application layer. To allow legitimate traffic to pass through, the ALG may dynamically open temporary firewall rules, often referred to as "pinholes." Pinhole: A temporary opening

Understand Advanced Firewall Features and Application-Level Gateway (ALG) Operations

Question

When a firewall acts as an application-level gateway (ALG), what does it require in order to establish a connection?

Options

APinhole
BDynamic IP and Port (DIPP)
CSession Initiation Protocol (SIP)
DPayload

Explanation

When a firewall acts as an Application-Level Gateway (ALG), it inspects and manages traffic at the application layer. To allow legitimate traffic to pass through, the ALG may dynamically open temporary firewall rules, often referred to as "pinholes." Pinhole: A temporary opening in the firewall that permits a specific connection (based on protocol, IP, and port) for the duration of a session. This is commonly used in protocols like SIP (Session Initiation Protocol) for VoIP or FTP (File Transfer Protocol) for data connections.

Topics

#Firewall ALGs#Network Security#Port Management#Application Protocols

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