Websites may be blocked by Cisco Umbrella for several reasons, including:
Occasionally, a safe website may be incorrectly tagged in a restricted category or flagged as a security risk. How the Blocking Process Works why is cisco umbrella blocking websites
The most critical reason for a block is to prevent harm. Cisco Umbrella leverages vast amounts of real-time and historical threat intelligence gathered from analyzing global internet traffic patterns. Its systems identify domains associated with: Websites may be blocked by Cisco Umbrella for
Beyond outright malicious sites, organizations use Umbrella to block entire categories of websites to enforce acceptable use policies, reduce legal liability, or improve productivity. Cisco Umbrella categorizes millions of domains into groups such as: reduce legal liability
Here is a solid breakdown of why Cisco Umbrella blocks specific websites.
A specialized security category may block access to domains that are very new (first queried within the last 24 hours), as these are often used in temporary phishing campaigns.