UPDATE: Canvas Service is coming back. Canvas DevOps team is continuing to monitor the situation.
Canvas is currently experiencing service interruption for many users due to a related AWS outage. Please visit the following link for detailed status information: http://status.instructure.com/
"AWS Outage Making Canvas Inaccessible for Many Users
Investigating - Canvas is currently experiencing an outage that we are investigating. Our DevOps team has determined that this is an AWS (Amazon Web Services) Outage. We will post updates as they become available."
A change was made to CUNIX today to address reported login issues. Some users may see warnings such as "host key is not cached in the registry" or "remote host identification has changed". If you see such a warning then it is ok to reply ‘yes’ to add the key to your cache or list of known hosts.
For further assistance, please contact the CUIT Helpdesk at email@example.com, or call 212-854-1919.
Update: Performance significantly improved at about 2:45pm. There are still a few problems with the web pages but delivery is up to date.
Performance of the Mailman mailing list system has been degraded today. Addresses @lists.columbia.edu are Mailman lists. Delivery of some messages has been delayed, and the list owner's web page for some lists does not display.