A.8.23 Web Filtering would include:
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Web Filtering Policy: Documentation of a formal web filtering policy that outlines the organization's approach to filtering web content and the criteria used to determine what should be blocked or allowed.
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Web Filtering Solution: Information about the web filtering solution in use, including its configuration, capabilities, and deployment across the organization's network.
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Blocked Website List: A list of websites that are blocked by the web filtering solution, demonstrating that access to potentially harmful or inappropriate content is restricted.
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Allowed Website List: A list of websites that are allowed by the web filtering solution, showing that access to essential and approved resources is maintained.
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User Access Logs: Logs and records of user web access, indicating which websites users have attempted to visit, whether they were allowed or blocked, and any attempts to bypass the filtering controls.
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Web Filtering Exceptions: Documentation of any exceptions or overrides to the web filtering rules, explaining the reasons for these exceptions and how they are approved and monitored.
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Compliance with Regulations: Evidence that the web filtering solution aligns with relevant industry regulations, standards, and best practices for web content filtering.
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Security Incidents: Records of any security incidents related to web filtering, including attempts to access blocked content or successful circumvention of filtering controls.
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Review and Monitoring: Documentation showing that the web filtering solution is regularly reviewed and updated to address new threats and adapt to changing security requirements.
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Training and Awareness: Evidence of employee training and awareness programs related to web filtering policies, ensuring that employees understand the importance of adhering to web filtering rules.
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Web Traffic Analysis: Analysis of web traffic data to identify patterns or anomalies that may indicate potential security risks or violations of the web filtering policy.
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Change Management: Documentation of change management processes related to the web filtering solution, ensuring that any changes to filtering rules or configurations are properly authorized and documented.
By reviewing these pieces of evidence, an auditor can assess the effectiveness of the organization's web filtering controls in preventing access to malicious or inappropriate content and protecting the network from web-based security threats. The goal is to ensure that the web filtering solution is appropriately configured and managed to support the organization's security objectives and compliance requirements
