Users must be required to justify why they are visiting a social media site. In this scenario, which feature accomplishes this task?

A Captive Portal is a feature that intercepts a user's web traffic and redirects them to a specific web page for an action before access is granted. In a Versa Networks environment, a Captive Portal can be integrated with a URL Filtering policy. When a user attempts to access a site in a specified category (e.g., social media), the policy can trigger the Captive Portal, which presents a page requiring the user to enter a justification. This is the only mechanism among the options that provides the necessary user interaction to fulfill the requirement.

A. IP filtering: This feature operates at Layer 3, blocking or allowing traffic based on IP addresses. It lacks the capability to interact with the user to request a justification.

B. SSL Inspection: This is a method used to decrypt and inspect encrypted traffic. While it is often a prerequisite for advanced URL filtering, it is not the feature that prompts users for input.

C. DNS filtering: This feature blocks access to websites by preventing the resolution of their domain names. It is a simple block/allow mechanism and cannot prompt for user justification.

1. Versa Networks VOS™ Next Generation Firewall Configuration and Administration Guide: In the chapter on "Security Policies

" the guide details the actions available for URL Filtering rules. One of the configurable actions is captive-portal. This action redirects the user's browser to a portal page for authentication or interaction before allowing the session to proceed. The section on "Configuring Captive Portal" further explains its use for user identification and presenting custom pages

which can be used to solicit justification.

2. Versa Networks Secure SD-WAN Configuration Guide: The section on "Unified Security Policy" describes how to create rules based on applications and URL categories. It specifies that a rule's action can be set to trigger a Captive Portal

enforcing user interaction for specific types of traffic

such as social media access. This directly supports using the portal for justification purposes.