It can happen to any computer system at any time

18th September 2019

NCSC advice to organisations to mitigate against DoS attacks. A suspected DoS attack resulted in Wikipedia experiencing intermittent outages in the early hours of 7th September.

Organisations worried about the threat of Denial of Service (DoS) attacks have been recommended to read guidance published by the National Cyber Security Centre. Advice for SMEs, large organisations, the public sector & cyber security professionals is readily available on the NCSC’s website.

Wikipedia suffered a suspected DoS attack on Saturday 07 September 2019 that resulted in intermittent site access for some users in the UK, Europe & the Middle East. When a website suffers a DoS attack, it will appear to users that the site has simply stopped displaying content. However, for businesses it could mean that the online systems they depend upon have ceased to respond.

The collection of guidance published by the NCSC helps organisations mitigate against DoS attacks and outlines the importance of understanding your service, creating a response plan, scaling and monitoring. There is also guidance around the very minimal DoS response plan any organisation should have in place.

Research links:

NCSC advice to organisations to mitigate against DoS attacks
SOCITM: Schools not cyber secure
RUSI: An Ambassador for Countering Hybrid Threats
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