Tuesday 24th July 2012

Network 24/07/2012 downtime explanation

Our report from the incident on 24/07/2012 is as follows.

Minor packet loss affecting a very small number of dedicated servers at Delta House

Underlying cause

A minor DOS attack to a boundary shared firewall


<10% packet loss to some subnets

Resolution We isolated the affected subnets and removed this from the shared firewall routes to let the core routers divert the traffic to the affected server.