The £4.2m system, supplied by Telindus, identifies attacks, their nature and origin, and what the attackers might do in response to a defensive or restorative action.
So far Nato has secured 70 systems running on an integrated voice, data and video conference network in 12 countries. In the following phases there will be more countries, more sites, more nodes, and a network upgrade, said Nato.
"The main tasks are prevention, detection, reaction and recovery. Putting them together and handing it over on time and on budget took skills that crossed the domain between networks and IT," said Luc Hellebooge, Telindus's defence unit director.
Nato has sharpened its attention on cyberdefence following events such as the 9/11 terrorist attacks and the May 2007 distributed denial of service attack on Estonia.
Nato's contract with Telindus, signed in 2005, includes engineering and design, implementation, logistics and quality, proof of concept and roll-out, testing, acceptance, training and equipment sourcing.