Today, application proxy firewalls are commonly used to protect internal clients from malicious external servers.

• A. True
• B. False
• C. Not sure
• D. Only in some deployments

Answer: (A)

Application proxy firewalls create a protective barrier by moving the decision point for external connections into the proxy itself. Internal clients connect to the proxy, which then establishes separate application‑layer connections to the external server, allowing the proxy to inspect and enforce policies on every request and response. This termination and inspection at the application layer enables deep content filtering, malware scanning, URL and protocol controls, and enforcement of authentication and access controls before anything reaches the internal host. As a result, internal clients are shielded from direct exposure to potentially malicious external servers, and security teams gain centralized visibility and control over traffic. In practice, enterprises commonly deploy forward proxies or secure web gateways to mediate outbound web traffic, and sometimes reverse proxies to protect internal resources from external clients. Given this widespread adoption and the protective capabilities, the statement holds true.