On Friday, December 9, 2016, at 9:18 AM, an increased multicast network traffic caused random 5 to 7 minutes network outage for some buildings on campus such as CE , EPH and CCS area. The Network Services team is investigating the root cause.
We apologize for any inconvenience.
-Computing and Communications Services
On Friday, November 25, 2016, at 11:30 AM, CCS received alerts about a network outage (wired and wireless) in the MAC building. The Network Services team is investigating the issue.
Upadate:
At 11:45 PM an adjustment was made to a network switch and services resumed
We apologize for any inconvenience.
-Computing and Communications Services
On Wednesday, November 23, 2016 at 12:25 PM CCS noticed slowness in accessing the Internet. The Network Services team is investigating the issue.
Update November 24, 2016:
The Internet access problems on November 23, 2016 was the result of a Distributed Denial of Service (DDoS) attack. DDoS network traffic is designed to stress networks and servers to the point that they become unavailable. In response, CCS began to aggressively filter network traffic but found that the attacker(s) changed their tactics several times in response.
During the initial stage of the attack people attempting to access the Internet from on campus had difficulty doing so or found access extremely slow. However, anyone off campus was still able to connect to Ryerson’s core services such as the my.ryerson.ca portal.
As Ryerson began aggressively filtering network traffic, a small number of people were no longer able to access Ryerson from off campus.
The attack subsided enough that by approximately 7 PM on November 23 network services were largely restored.
CCS is analysing the attack and is working to improve our network’s resilience.
Update November 25, 2016:
Computing and Communications Services (CCS) has added an additional firewall at Ryerson’s gateway to the Internet. Our goal is to increase our capacity to handle and control larger volumes of network traffic. This should help us better manage distributed denial of service (DDoS) attacks in the future. This change supplements the earlier addition of a DDoS filtering appliance.
Please accept our apologies for the problems the DDoS attack on November 23 caused.
-Computing and Communications Services
Google reported issues with Google Drive/Doc/Sheet/Slides at 9:18 AM today and the issues were resolved at 9:29 AM:
https://www.google.com/appsstatus#hl=en&v=status
Please accept our apologies for any inconvenience these issues may have caused.
-Computing and Communications Services
The blog.ryerson.ca server became unresponsive on Saturday, Nov. 19, 2016 at 6:40 PM with a database error. The server was restarted and returned to service by 7:51 PM. We are investigating the root cause.
Please accept our apologies for the problems this outage caused.
-Computing and Communications Services
On Friday, November 18, 2016, at 11:00 PM, CCS received alerts that the east side of the campus is experiencing wired and wireless network outage, including podium desktops. The Network Services team is investigating the issue.
Upadate:
At 12:38 PM a network switch was rebooted and services resumed
We apologize for any inconvenience.
-Computing and Communications Services
Ryerson’s Blog system, blog.ryerson.ca, experienced a system outage from Monday, Nov. 7, 2016 5:50 PM to Tuesday, Nov. 8, 2016 7:40 AM.
We are investigating the cause of the problem.
Please accept our apologies for any inconvenience this may cause.
-Computing and Communications Services
The applications hosted on the Student Services Cold Fusion instance (ss.cf.ryerson.ca), such as Athletics, Bookstore, CESAR Elections and TTC, were either partially or completely unavailable between approximately 11 AM on Monday, Oct. 31, 2016 and 5 PM on Tuesday, Nov. 1, 2016. The issue has been isolated to one application, which has been taken offline. The rest of the applications were fully brought back online. We continue to investigate the root cause.
We apologize for any inconvenience.
-Computing and Communications Services
Jira, Confluence and IM/Spark (the instant message service) were not available from 7:47 Am to 9:48 Am today due to a database server partition issue. The issue has been fixed and the services have returned to normal. We are looking into ways to prevent this from happening again.
We apologize for the inconvenience.
-Computing and Communication Services
Printing to CCS managed lab printers, including those in the Library Commons (LIB272), TRS and KHW71 is currently not working. The problem was reported around 9:40 AM and it is being actively investigated. We will provide an update shortly.
UPDATE: The printing issue was resolved around 10:40 AM.
Please accept our apologies for the inconvenience.
-Computing and Communications Services
