Active Cyber Defence

The NCSC programme tackling cyber attacks in a relatively automated and scalable way, to improve national resilience.

Four ‘Active Cyber Defence’ programmes will help to immediately improve basic cyber security across UK business and government departments.

UK Public Sector DNS service

The UK Public Sector DNS service is now live - here is what it is and how to use it.

Ian Levy explains why the NCSC asked Nominet to build this critical service.

Simple steps so your organisation can use the new UK Public Sector DNS services.

Web Check Findings example screen shot

Introducing Web Check — a service that helps you find and fix common vulnerabilities in UK public sector websites you manage.

Get Started

Active Cyber Defence programmes that will immediately help to improve basic cyber security across the public sector, at scale.

Web Check

Web Check — a free-to-use website configuration and vulnerability scanning service, available to all UK public sector organisations.

It is simple to use - first you create your own 'watch list' of website URLs you manage. Then Web Check runs a growing set of non-intrusive scans and reports its findings to you.  You can share your URLs and findings with colleagues and annotate findings for future reference.

Find out more about Web Check.

Email Security & Anti-Spoofing

We’re encouraging and tracking adoption of email security standards across the public sector.

For advice on how to understand and improve your email security please read our latest guidance on email security and anti-spoofing.

Read the blog introducing this particular piece of guidance here.


The National DNS service provides the UK public sector with two reliable DNS resolution services that protect users from threats posed by known, malicious malware.

The service is available to all UK government and public sector organisations, via the internet (available now) and via the Public Services Network (PSN) (available soon).

Find out more about the National DNS service.