Method and apparatus for disarming a security system

1. A central security controller for automatically 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 the device proximate to the home or the business;

wherein the instructions that cause the central security controller to determine that the command originated from the 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 the 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 the local area network; and

determine that the command originated from the device proximate to the home or business when at least the portion of the source address of the command matches at least the portion of the local network address assigned to the central security controller.

2. The central security controller of claim 1 , wherein the instructions that cause the central security controller to compare at least the portion of the source address of the command to at least the portion of the local network address assigned to the central security controller comprises instructions that cause the central security controller to:

apply a mask to the source address;

wherein the portion of the source address comprises the result of the masking application.

3. The central security controller of claim 1 , wherein the processor-executable instructions further comprise instructions that cause the central security controller to:

receive an indication that an entry door has been opened;

in response to receiving the indication, initiate a countdown timer; prior to expiration of the time, receive the disarm command;

when the disarm command was determined to have been provided by the personal communication device proximate to the central security controller, cancel the countdown timer; and

provide an indication that the security system has been disarmed.

4. The central security controller of claim 1 , wherein the processor-executable instructions further comprise instructions that cause the central security controller to:

determine whether the personal communication device that sent the disarm command is authorized to disarm the security system; and

disarm the security system only when the disarm command is received from the personal communication device proximate to the home or the business and when the personal communication device that sent the disarm command is authorized to disarm the security system.

5. The central security controller of claim 4 , wherein the instructions that cause the central security controller to determine whether the personal communication device that sent the disarm command is authorized to disarm the security system comprises instructions that cause the central security controller to:

receive identification information from the personal communication device during a registration process with the personal communication device; and

store the identification information in the memory for later comparisons to identification information associated with received disarm commands.