Category Archives: Firewall

Network outage – Thursday, May 9, 2013

Posted on May 9, 2013 by michael

Due to a problem with a core network firewall, IT security tried to implement a quick fix.  Unfortunately, that resulted in a network outage for all wired networks on campus.  The connection was reset and network connectivity restored 4 minutes later. … Continue reading →

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Intermittent Network Disruptions: Saturday, April 20, 4 PM

Posted on April 25, 2013 by Brian Lesser

Due to the gradual degradation in performance of a firewall, the following areas have experienced very brief network interruptions: Admissions Administrative Network Architecture Architecture Administrative Network Arts CCS Civil Engineering DMZ Docutech EPH Academic Network GCM ILC Administrative Network JOR Academic … Continue reading →

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General Network Slow Response – July 10, 2012 08:15 AM

Posted on July 10, 2012 by kwoo

At approximately 8:15 am today, CCS started receiving reports of a general slow response when accessing core Ryerson applications as well as the Internet. Preliminary investigation indicates the problem to be with the network core firewall cluster.  CCS IT Security staff are investigating … Continue reading →

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High Firewall CPU Utilization Affecting OGF and SAS Services – 8:30 am, May 08, 2012

Posted on May 9, 2012 by kwoo

The data centre firewall in front of SAS, OGF and HR systems is currently experiencing high CPU utilization, over 90%. This may be increasing the response times for users trying to access these systems. The problem has been identified. There … Continue reading →

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Service Interruption Due to Data Centre Firewall Problem – 7:15 am,Tuesday, March 13, 2012 – UPDATE

Posted on March 13, 2012 by kwoo

UPDATE: 10:20 am, Tuesday, March 13, 2012 The problem has been isolated to a departmental server.  The server was sending large amounts of data, causing the firewall to go to high levels of utilization.   The server has since been … Continue reading →

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