industrial demilitarized zone infrastructure: provision of the Threat Prevention Subscription from Palo Alto Networks for a redundant IDMZ PA-440 firewall pair as front or back firewall (= Redundant Bundle). The term of the subscription is 3 years from activation. If the product is not activated, the term begins automatically approx. 30 days after delivery. If subsequently extended, the new term of the subscription follows on without a gap from the previous term.