According to one embodiment, a communication apparatus communicates with a partner apparatus through a network. The communication apparatus comprises a protocol analyzing unit that analyzes a transmission frame or a reception frame, the transmission frame being generated by an external CPU and being transmitted to the partner apparatus, the reception frame being received from the partner apparatus. The communication apparatus comprises a connection information managing unit that allocates a storage area in which connection information is stored, in a predetermined storing apparatus that can be accessed by the CPU, when a connection establishment request is detected from the transmission frame or the reception frame as a result of the analysis by the protocol analyzing unit, the connection information being used while being shared with the CPU. The protocol analyzing unit notifies the CPU of information indicating the storage area allocated by the connection information managing unit.