Last updated: 
4 months 1 week ago
Blog Manager

We are the Computer Security and Incident Response Team (CSIRT) for the Janet network. Part of Jisc's Security Operations Centre, our mission is to safeguard the current and future network security of Janet (steering the security policies for all Janet connections) and of our customers, creating a secure environment to conduct your online activities. Our primary function is monitor and resolve any security incidents that occur on the Janet network, with specialists tracking a range of platforms, including Unix, Linux and Windows.

Blog Article

We continue to monitor the effect of the filtering of large ntp packets (> 128 bytes) at the Janet borders. Where people have had concerns we've been working with them to make sure that their work is impacted as little as possible by this measure.

The filtering has had a large reduction on the impact to Janet infrastructure but the current filtering limits still allow enough traffic through the Janet border to cause disruption for customers with 100Mb/s, or busy 1Gb/s, connections.

Blog Article

The increasing frequency, number and size of ntp based DDoS attacks against Janet connected organisations has at times briefly degraded connectivity to sections of the network. Whilst we are able to react to these attacks as and when they occur, the impact upon our customers can be significant. This situation is far from unique to Janet - ISPs globally are struggling with this issue.

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