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Some websites are not being blocked when they should

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Article ID: 173331

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Updated On:

Products

Web Security Service - WSS

Issue/Introduction

Some sites that should be blocked by policy are not being blocked when using Unified Agent (UA).

Cause

This could be caused by connections to websites via IPv6, which Web Security Service (WSS) does not monitor. When visiting test.threatpulse.com, it shows protected because that connection is via IPv4.

Environment

Web Security Service

Resolution

You can block IPv6 traffic through UA by doing the following:

  1. Log into your WSS portal
  2. Navigate to Connectivity > WSS Agent
  3. Check the box for Block IPv6 traffic

This will block DNS requests for IPv6 destinations.