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Creating a new NHS England: NHS England and NHS Digital merged on 1 February 2023. All references to NHS Digital now, or in the future, relate to NHS England. More about the merger.

NHS Secure Boundary

Our NHS Secure Boundary service is a perimeter security project supporting NHS organisations. Find out how we can help you secure your organisation.

About our secure boundary service 

Our secure boundary service provides a perimeter security solution offering protection against security threats.

This solution is part of a larger programme of work being delivered by NHS Digital’s Data Security Centre (DSC) to ensure the confidentiality, integrity, and availability of patient data, as well as protecting clinical and business systems from emerging threats.

The solution uses next generation firewall (NGFW) and web application firewall (WAF) protection to protect internet traffic from digital and cloud-based threats. 

Following the closure of the onboarding programme at the end of July 2021, there will be a cost to NHS organisations to fund the onboarding. The run the service element will remain free.


Find out about the benefits of NHS Secure Boundary.

How the service is being developed

Find out how the service is being developed by expanding each phase: 

Set up 

This phase ran until December 2019 and consisted of configuring and testing the platform, and the design and build of operational services, processes and procedures.


The onboarding phase will consist of project teams working with NHS organisations and consumer network service providers to deploy the service.

This phase is expected to last for two years.


Accenture will provide tier 2 support into the NHS Customer Service Function with tier 3 support from Palo Alto and Imperva. Managed services will be delivered utilising an IT Service Management (ITMS) Framework with ISO 20000 accredited ITIL v3 processes.

This phase is expected to last for at least five years.

How it works 

NHS Secure Boundary contains two main technology parts, protecting two types of internet traffic:

Graphic showing how the service works

Bi-directional traffic (internal traffic) 

This is traffic from within the NHS perimeter. Internet activity is protected by PaloAlto and Prisma Access technology. 

Inbound traffic (external traffic) 

This is traffic from outside of the NHS perimeter. Data is protected by the Imperva Incapsula web application firewall.


Below are details of the different secure boundary components. You can expand them to find out more:

Palo Alto Prisma Access 

This is a software as a service (SaaS) based, modern next-generation firewall (NGFW) capability in the cloud, which can be used by NHS organisations to increase their digital security.  

It includes: 

  • stateful High Availability (HA) pairs of VM-Series NGFW 
  • the ability to be hosted across availability zones 
  • dedicated firewalls for each tenant 
  • a bandwidth pool apportioned to tenants based on identified bandwidths 
Cortex Data Logging Service 

This collates all logs from the firewalls and management platforms within the solution.  

It includes: 

  • retention of traffic, configuration and systems logs for six months 
  • forwarding of filtered logs to the Data Security Centre Cyber Security Operations Centre (CSOC), enabling us to monitor cyber events across the NHS estate, and provide rapid protection as incidents and risks emerge 

WildFire is a sandboxing platform designed to identify zero-day threats.  

It includes:  

  • file sandboxing for analysis of unknown threats 
  • creation of signatures to block malware and block the other behaviours 
  • dissemination of threat signatures to all Wildfire users, so detection by one can protect all  
  • static and dynamic analysis over multiple operating systems and application versions 
Panorama Management Console 

Management of the Prisma platform will be done via the central management console, Panorama.  

It includes: 

  • a common Graphical User Interface (GUI) integrated with NHS Mail Single Sign On (SSO) 
  • a tenant-in-tenant approach to provide global and local control 
  • Amazon Web Services (AWS) hosted Panorama with additional NGFWs and role-based access control 

MindMeld is a platform taking in threat data from sources outside of the secure boundary, allowing that threat data to be used by the firewalls in the solution.  

It includes:  

  • aggregation and correlation of threat intelligence feeds 
  • enforcement of new prevention controls, including IP deny lists 
Imperva Cloud Web Application Firewall (WAF) 

This is a SaaS based WAF solution to protect applications from malicious online attacks.  

It includes: 

  • protection against the most critical web application security risks, such as Structured Query Language (SQL) injection, cross-site scripting, illegal resource access, remote file inclusion 
  • multiple capability offerings to meet current and future requirements whilst being cost effective 


Here are some of the capabilities offered by the secure boundary service. Expand them to find out more:

Uniform Resource Locator (URL) filtering 

Monitors and controls access to websites and website categories. 

Application ID (APP ID) 

Visibility of active applications. 


Selective decryption of traffic for the advanced detection of threats. 


Protects publicly hosted web services from a wide range of online threats.

IP allow list

During your organisation’s migration to NHS Secure Boundary, the public IP addresses will change.

If your organisation uses HSCN to access the internet, your CNSP will be in contact to communicate the new IP addresses. If your organisation is on-boarding to NHS Secure Boundary directly to protect a local internet breakout, the new IP addresses will be communicated to you through your on-boarding project manager.

Following this, your organisation will need to notify any services your organisation accesses to ensure they add the new IP address range to the allow list. 

If you don't take action your organisation could lose access to any services that manage access through an allow list.

NHS related services that may implement allow list access

As we progress through on-boarding, NHS related services using IP allow lists to control access will become known and will be advertised on this support page.

Several services outlined below are thought to use allow list access.

If you are aware of any services that use allow list access but do not appear on this list, please email the NHS Secure Boundary team at so records can be updated.

Service Type Contact Phone number
Easy (Giltbyte) Finance N/A
ISOxford Library N/A
NHS Resolution Risk and legal 020 7811 2820
Open Athens Library and 
0300 121 0043
PharmPress (Digital BNF) National N/A
Warwick University Medical study and
York University Remote access to HYMS University 01904 323838
Ignaz Smartphone app for healthcare professionals N/A
National Joint Registry Joint replacement registry 0845 345 9991
NYH Trauma Network Major trauma network for North Yorkshire and Humberside 01482 622394
Taycare Orthotics 0113 231 1800
Infopoint ESR Human resources and payroll database system IBM Servicedesk: 0845 600 8249
NHS Blood and Transplant Blood and transplantation service to the NHS 0300 123 23 23
National Institute for Health and Care Excellence (NICE) – Clinical Knowledge Summaries Providing primary care practitioners with a summary of the current evidence base and practical guidance on best practice 0300 323 0140


Register for the service

To register for the secure boundary service, or if you have any questions, please email

Access our knowledge base

If you've already registered for NHS Secure Boundary, you can access our knowledge base, which contains guidance on the service.

Last edited: 24 January 2023 1:08 pm