DDoS mitigation services

Man looking at code on screens.

Detecting and filtering distributed denial of service (DDoS) attack traffic across the Janet Network – reducing disruption, financial loss and reputational damage.

DDoS attacks are increasing in scale, sophistication and frequency. Jisc provide a cost-effective way to mitigate these attacks, in a way that suits your needs and budget.

Our DDoS protection services include:

  • Foundation DDoS mitigation service – protecting your Janet connectivity during business hours
  • Foundation plus - round the clock protection against DDoS attacks on your Janet connectivity
  • Critical services protection - protecting mission critical services including your DNS, website and VPN services
  • Geo-IP filtering – gives Janet-connected members greater protection against ransomware attacks by restricting access to RDP (TCP port 3389 only) using geographic IP location blocking. If you would like to opt out of this service, please contact irt@jisc.ac.uk and specify the range of IPs you wish to exclude.

Foundation DDoS mitigation

As part of your Jisc subscription, you benefit from our foundation DDoS mitigation service. We monitor traffic for unexpected patterns. If an alert is triggered, traffic to the address is re-routed via the mitigation scrubbing centre. Attack traffic is then filtered out using carefully selected criteria and benign, business-as-usual traffic continues to flow to and from your services.


  • Support for the service: available 08:00-18:00, Monday-Friday
  • On-call service: available 18:00-midnight, Monday-Friday and 09:00-17:00, Saturday-Sunday
  • Bank holidays: on-call service available 09:00-midnight

Benefit from 24/7 protection against DDoS attacks with foundation plus

With many of us now working more flexibly and needing access to services outside of normal working hours, we've developed a new DDoS mitigation service to ensure your organisation is always protected. 

Foundation plus takes your foundation DDoS a step further, providing round-the-clock automated protection against Jisc detected volumetric and state exhaustion DDoS attacks affecting your Janet connectivity. 

You'll also have enhanced network protection at key times of the year, such as clearing, enrolment or peak operating months. We provide you with 24/7 out-of-hours notifications to give you visibility and peace of mind.

For extra peace of mind choose critical services protection

If you want to protect specific, business-critical services or do as much as you can to maintain business continuity, our critical services protection service offers out-of-hours customisable protection of your key business systems against DDoS attacks.

What's included
Foundation DDoS mitigationFoundation plus Critical services protection (CSP)
Protect your Janet network connection from DDoS attacksIncludedIncluded
Tailored protection against DDoS attacks for core services such as Web, VPN, DNSIncluded
Service has 24/7 protection capability IncludedIncluded
Automated protection for fast response times IncludedIncluded
Permanent mitigation protection of your chosen services available Included
Includes bespoke proposal assisting stakeholder buy-in Included

Cyber security portal

Having a clear overview of network traffic is a useful part of any DDoS mitigation strategy. If you’re connected to the Janet Network, you can view traffic on your connection by accessing our cyber security portal. The portal also gives details of alerts or DDoS mitigations, whether in the past or currently in progress.

Over time, the portal will also integrate other Jisc security services – letting you access more information about network security, and control services to which you subscribe.

Contact us

To find out more about DDoS mitigation from Jisc, contact your relationship manager, or see our range of cyber security services.

ISO certification

This service is included within the scope of our ISO9001 and ISO27001 certificates.

Read more about International Organisation for Standardisation (ISO) standards and view Jisc certificates.

ISO 9001-2015 UKAS logo

ISO/IEC 27001 UKAS logo