OpenText incident

Core DNS Protection Block Page experienced an issue

Minor Resolved View vendor source →

OpenText experienced a minor incident on September 23, 2026 affecting Core DNS Protection, lasting 5d 20h. The incident has been resolved; the full update timeline is below.

Started
Sep 23, 2026, 08:10 PM UTC
Resolved
Sep 29, 2026, 04:50 PM UTC
Duration
5d 20h
Detected by Pingoru
Sep 23, 2026, 08:10 PM UTC

Affected components

Core DNS Protection

Update timeline

  1. investigating Sep 23, 2026, 08:10 PM UTC

    Core DNS Protection Block Page customers accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. Teams are currently assembled and working to resolve the issue. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. We appreciate your patience. Tracking Number: I5791953

  2. investigating Sep 23, 2026, 09:10 PM UTC

    Core DNS Protection Block Page customers accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. Teams are currently assembled and working to resolve the issue. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. We appreciate your patience. Tracking Number: I5791953

  3. investigating Sep 23, 2026, 10:13 PM UTC

    Core DNS Protection Block Page customers accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. Teams are currently assembled and working to resolve the issue. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. We appreciate your patience. Tracking Number: I5791953

  4. investigating Sep 23, 2026, 11:09 PM UTC

    Core DNS Protection Block Page customers accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. Teams are currently assembled and working to resolve the issue. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. We appreciate your patience. Updates for this issue will be sent every 8 hours or if there are significant updates, whichever comes first. Tracking Number: I5791953

  5. investigating Sep 24, 2026, 07:09 AM UTC

    Core DNS Protection Block Page customers accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. Teams are currently assembled and working to resolve the issue. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. We appreciate your patience. Updates for this issue will be sent every 8 hours or if there are significant updates, whichever comes first. Tracking Number: I5791953

  6. identified Sep 24, 2026, 02:17 PM UTC

    Core DNS Protection Block Page clients accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. Teams have identified the cause and are working to resolve the issue as quickly as possible. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. Updates for this issue will be sent every 8 hours or if there are significant updates, whichever comes first. We appreciate your patience. Tracking Number: I5791953

  7. identified Sep 24, 2026, 10:17 PM UTC

    Core DNS Protection Block Page clients accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. Teams have identified the cause and are working to resolve the issue as quickly as possible. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. Updates for this issue will be sent every 12 hours or if there are significant updates, whichever comes first. We appreciate your patience. Tracking Number: I5791953

  8. identified Sep 25, 2026, 12:15 PM UTC

    Core DNS Protection Block Page clients accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. Teams have identified the cause and are working to resolve the issue as quickly as possible. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. Updates for this issue will be sent every 12 hours or if there are significant updates, whichever comes first. We appreciate your patience. Tracking Number: I5791953

  9. identified Sep 25, 2026, 09:40 PM UTC

    Core DNS Protection Block Page clients accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. Teams are implementing a fix, and the backend update is already in place. The required DNS Agent update is currently being validated before broader deployment, and a related client utility update is also planned to be deployed. We appreciate your patience. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. Updates for this issue will be sent on 28 September 2026 or if there are significant updates, whichever comes first. Tracking Number: I5791953

  10. identified Sep 28, 2026, 01:31 PM UTC

    Core DNS Protection Block Page clients accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. Teams are implementing a fix, and the backend update is already in place. The required DNS Agent update is currently being validated before broader deployment, and a related client utility update is also planned to be deployed. We appreciate your patience. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. Updates for this issue will be sent every 6 hours or if there are significant updates, whichever comes first.

  11. identified Sep 28, 2026, 08:15 PM UTC

    Core DNS Protection Block Page clients accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. Teams have scheduled the required DNS Agent update to begin today, and a related client utility update is also planned to be deployed. We appreciate your patience. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. Updates for this issue will be sent every 6 hours or if there are significant updates, whichever comes first. Tracking Number: I5791953

  12. identified Sep 29, 2026, 02:13 AM UTC

    Core DNS Protection Block Page clients accessing blocked HTTPS websites may see a browser certificate warning instead of the DNS Protection block page. Blocked websites remain inaccessible, and DNS Protection continues to enforce policies as expected. The required DNS Agent update, and a related client utility update is in progress. We appreciate your patience. No customer action is required at this time. If further action becomes necessary, specific instructions will be provided. Updates for this issue will be sent by 1:00 PM Eastern tomorrow, or if there are significant updates, whichever comes first. Tracking Number: I5791953

  13. resolved Sep 29, 2026, 04:50 PM UTC

    Core DNS Protection Block Page clients experienced an issue accessing blocked HTTPS websites. The required updates are now available and should be applied automatically soon. Once completed, the issue is expected to be resolved without further action. The related certificate deployment utility is also available for download. We appreciate your patience. Tracking Number: I5791953