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350-201 · Question #49

Refer to the exhibit. Which two steps mitigate attacks on the webserver from the Internet? (Choose two.)

The correct answer is A. Create an ACL on the firewall to allow only TLS 1.3 B. Implement a proxy server in the DMZ network. Enforcing TLS 1.3 on the firewall eliminates weak encryption attack vectors, and placing a proxy server in the DMZ adds an application-layer inspection buffer that shields the webserver from direct Internet exposure.

Techniques

Question

Refer to the exhibit. Which two steps mitigate attacks on the webserver from the Internet? (Choose two.)

Exhibit

350-201 question #49 exhibit

Options

  • ACreate an ACL on the firewall to allow only TLS 1.3
  • BImplement a proxy server in the DMZ network
  • CCreate an ACL on the firewall to allow only external connections
  • DMove the webserver to the internal network
  • EMove the webserver to the external network

How the community answered

(18 responses)
  • A
    83% (15)
  • C
    11% (2)
  • E
    6% (1)

Why each option

Enforcing TLS 1.3 on the firewall eliminates weak encryption attack vectors, and placing a proxy server in the DMZ adds an application-layer inspection buffer that shields the webserver from direct Internet exposure.

ACreate an ACL on the firewall to allow only TLS 1.3Correct

Creating a firewall ACL that permits only TLS 1.3 ensures all inbound connections use the most current and secure protocol version, which eliminates known vulnerabilities associated with older versions such as TLS 1.0 and 1.1 (for example, POODLE and BEAST attacks) and enforces strong cipher suites by design.

BImplement a proxy server in the DMZ networkCorrect

A reverse proxy deployed in the DMZ acts as an intermediary between Internet clients and the backend webserver, concealing the server's internal address, terminating connections, and providing an additional inspection point where malicious requests can be identified and blocked before they reach the webserver.

CCreate an ACL on the firewall to allow only external connections

Allowing only external connections is not a coherent security policy and would block legitimate internal administrative traffic while providing no meaningful filtering of threats from the Internet.

DMove the webserver to the internal network

Moving the webserver to the internal network makes it unreachable from the Internet, which prevents it from serving its intended purpose as a public-facing web resource.

EMove the webserver to the external network

Placing the webserver directly on the external network removes all firewall protection, fully exposing it to untrusted Internet traffic with no filtering or inspection layer.

Concept tested: DMZ proxy placement and TLS enforcement for web server hardening

Source: https://datatracker.ietf.org/doc/html/rfc8446

Topics

#ACL#TLS#DMZ#proxy server

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