NETWORK SYSTEM AND COMMUNICATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a network system and a communication method for enabling required data communication between communication object equipment on an intranet side protected by a firewall and a management device connected through the Internet. SOLUTION: In this network system for performing data communication between the communication object equipment 1 connected to an internal network 5 connected to an external network 3 through the firewall 4 for passing through only signals corresponding to a specified communication protocol and the management device 2 connected to the external network 3 for operating the communication object equipment 1 or monitoring the operation, the communication object equipment 1 adds data to a request corresponding to the specified communication protocol and transmits them to the management device 2.