The ICT service

Current Firewall and Network Issues

As at Tuesday 24 January 2017

We are sure you will all be aware by now we have been experiencing intermittent connectivity issues with the Internet connection shared by all Cambridgeshire schools since the afternoon of Tuesday 17 January 2017.
We have so far identified this to be a fault with our core Firewalls.  These are devices that act as a barrier from the Internet protecting schools from unauthorised access. We have dedicated our most senior technical resources and are in constant communication with the manufacturer who is supporting us.
As the root cause of this fault is not obvious to us or the manufacturers, we have taken several steps to mitigate the impact it is having on our services and schools. One such step was to reduce the overhead on the Firewalls by turning off some important, but not daily essential services. This has had the desired effect and since Thursday at 9.40am there have been a small number of outages compared to Tuesday and Wednesday when it was every 10 minutes.
Diagnosis of this type of problem is predominantly carried out by reviewing the configuration and logs for the Firewalls. Due to the scale of our Firewall implementation and complexity of this issue, only the Firewall manufacturer can pin point the data within the logs to identify the root cause.
Because of the workarounds we have implemented there was some time between each failure and because of the added time for the manufacturer to subsequently analyse the logs, it has turned into a very drawn-out process to find the resolution.  It has since been necessary for us to switch services back on to produce the fault more frequently to give further troubleshooting information.  
We turned the services back on in the evening of Monday 23 January at 5.45pm, at which point the service was disrupted for 5 to 10 minutes. We then lined up a dedicated resource from our Firewall provider to be available during peak customers’ login times, on Tuesday 24 January, to view the logs and fault in real time. Unfortunately, this meant that there was an increased level of disruption while we gathered this information. We approximated that we should have enough logging information by 11:30am.
We apologise for the increased disruption but we believe it is essential to finding the root cause and to resolve the issue.
As soon as we have enough information we will attempt to return the Firewall to a state where it minimises the impact to schools if an immediate fix is not found.
We will continue to provide updates via our normal communication channels in instances such as these.
As a reminder, you can get updates here: 
Status website - – please note the availability statistics on the site are a 5 minute checks, if there is a short or intermittent outage they may not be captured.
Twitter - - this feed is also displayed on the side of the status website in viewed in a desktop browser and on our website
Facebook -
The ICT Service Helpline - call us on 0300 300 0000.  
When we experience issues like this we add the latest information as a message before you are put through to the team.
I do hope you will agree that this is very much out of the ordinary in terms of the level of service we provide and I thank you for your patience.  I can assure you this is our highest priority and working to return the service to normal levels as soon as possible.

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