Cisco Umbrella Blocking Websites ~upd~ -

: If the requested domain is identified as a threat or violates a company policy, Umbrella does not return the actual IP address. Instead, it resolves the request to the IP of a Cisco Umbrella block page server .

To avoid constant tickets, follow these administrative best practices:

You might have tried to visit a site today and seen a blue/red block page citing "Cisco Umbrella." Don't worry—your device isn't broken.

Do not try to use a proxy or VPN to bypass it (that will get flagged by IT). cisco umbrella blocking websites

: Blocks specific applications (e.g., cloud storage services) regardless of the domain name used to access them.

: The user's browser is then directed to a customized or default block page, which explains why the site is inaccessible (e.g., malware, phishing, or restricted content categories like gambling).

Here are a few options for your post, depending on the audience is (IT admin vs. general employee) and where you are posting (Internal Slack/Teams, IT ticket response, or LinkedIn blog). : If the requested domain is identified as

Here is what actually happens when Umbrella blocks a request:

Sometimes the opposite happens: a user accesses a site that clearly should be blocked, but Umbrella lets it through.

👇 Drop your questions below.

Cisco Umbrella is a cloud-delivered security service that acts as a first line of defense against internet threats. By intercepting DNS requests before a connection is established, it identifies and prevents access to malicious or unwanted websites. This process, often referred to as DNS-layer security, ensures that users stay protected whether they are on the corporate network or working remotely. How Cisco Umbrella Blocks Websites

Thought leadership, explaining how it works.

Are you blocking a site that uses HTTPS? Umbrella generally cannot inspect the content of HTTPS traffic unless you are using the . If you see a generic block page rather than a detailed category block page, it might be an SSL handshake issue. Ensure your root CA certificate is installed on the client machine so Umbrella can present the block page correctly. Do not try to use a proxy or