Critical incident

University of Waterloo: Intermittent DNS timeouts - Degradation

Affected: DNS

Current status of University of Waterloo: Minor issues — live University of Waterloo status

Timeline

1. Aug 19, 2026, 11:54 UTC
   investigating
   IST is investigating intermittent DNS timeouts. More information will be shared when it becomes available.
2. Aug 19, 2026, 12:19 UTC
   investigating
   UPDATE: A number of DNS servers did not recover after planned software upgrades this morning. Those servers have now been removed from the anycast server pool. A case has been opened with the vendor. --------- IST is investigating intermittent DNS timeouts. More information will be shared when it becomes available.
3. Aug 19, 2026, 19:08 UTC
   resolved
   A software rollback was performed on the affected servers, and the problem was resolved. The vendor case will continue and further maintenance will be scheduled at a later date.

Updates as published by University of Waterloo (original).