An alarm access controller is operative to control access to an enterprise network of a communication system responsive to alarms generated by products that are part of a set of internal resources of the enterprise network. In one aspect, the alarm access controller is implemented by a server or other processing element comprising a processor coupled to a memory. The alarm access controller is configured to receive an alarm from one of the products, to identify an external service provider for handling the alarm, and to provide temporary authenticated access of the service provider to the product. By limiting service provider access to an alarm-generating product in accordance with specified time periods or other conditions determined based at least in part on the alarm itself, system security is considerably improved and access control is made more flexible and efficient.