A central security controller for disarming a security system associated with a home or a business, comprising: a network interface for sending messages and receiving commands over a local area network associated with the home or the business; a memory for storing processor-executable instructions; and a processor, coupled to the network interface and the memory, for executing the processor-executable instructions that cause the central security controller to: receive, by the network interface, a command to disarm the security system; determine, by the processor, whether the command originated from a personal communication device proximate the home or business; and disarm the security system when the command originated from a device proximate to the home or the business; characterised in that the instructions that cause the central security controller to determine that the command originated from a device proximate to the home or the business comprises instructions that cause the central security controller to: evaluate, by the processor, a source address of the command; compare, by the processor, at least a portion of a source address of the command to at least a portion of a local network address assigned to the central security controller by a wireless router that forms part of a local area network; and determine that the command originated from a device proximate to the home or business when at least a portion of the source address of the command matches at least a portion of the local network address assigned to the central security controller. a network interface for sending messages and receiving commands over a local area network associated with the home or the business; a memory for storing processor-executable instructions; and a processor, coupled to the network interface and the memory, for executing the processor-executable instructions that cause the central security controller to: receive, by the network interface, a command to disarm the security system; determine, by the processor, whether the command originated from a personal communication device proximate the home or business; and disarm the security system when the command originated from a device proximate to the home or the business; characterised in that the instructions that cause the central security controller to determine that the command originated from a device proximate to the home or the business comprises instructions that cause the central security controller to: evaluate, by the processor, a source address of the command; compare, by the processor, at least a portion of a source address of the command to at least a portion of a local network address assigned to the central security controller by a wireless router that forms part of a local area network; and determine that the command originated from a device proximate to the home or business when at least a portion of the source address of the command matches at least a portion of the local network address assigned to the central security controller. receive, by the network interface, a command to disarm the security system; determine, by the processor, whether the command originated from a personal communication device proximate the home or business; and disarm the security system when the command originated from a device proximate to the home or the business; characterised in that the instructions that cause the central security controller to determine that the command originated from a device proximate to the home or the business comprises instructions that cause the central security controller to: evaluate, by the processor, a source address of the command; compare, by the processor, at least a portion of a source address of the command to at least a portion of a local network address assigned to the central security controller by a wireless router that forms part of a local area network; and determine that the command originated from a device proximate to the home or business when at least a portion of the source address of the command matches at least a portion of the local network address assigned to the central security controller. evaluate, by the processor, a source address of the command; compare, by the processor, at least a portion of a source address of the command to at least a portion of a local network address assigned to the central security controller by a wireless router that forms part of a local area network; and determine that the command originated from a device proximate to the home or business when at least a portion of the source address of the command matches at least a portion of the local network address assigned to the central security controller.