Earticle

Due to a recent increase of usage of Internet and users of smart devices, there has been an increasing trend of wireless networks that can be conveniently used. However, wireless network is exposed to a weaker security than wire network. Because of such a security-related issue, users are exposed to the crime and also financial damage as well. In addition, there is an issue that using the AP of wireless network makes it feasible for a party to break into an internal network. This study is intended to suggest a system for prevention of harmful invasion with access from wireless LAN Access Point. In order to verify the function of invasion prevention system, tools used in the penetration testing were utilized preparing for a scenario that made an attempt of attack on wireless network.

Currently, the commercialization of the $5^{th}$ Generation (5G) service is becoming more prevalent in domestic communication network technology. This has reduced communication delay time and enabled large-capacity data transmission and video streaming services in real-time. In order to keep pace with these developments, K-water has introduced a smart process control system in water purification plants to monitor the status of the water purification process. However, since wireless networks are based on the public Long Term Evolution (LTE) network, communication delay time remains high, and high-resolution video services are limited. This is because communication networks still have a closed structure due to expense and security issues. Therefore, with 5G in its current form, it is very difficult to accommodate future services without improving the infrastructure of its communication networks. In recognition of these problems, this study implemented the authentication and management function of wireless networks on a wired network management system in the K-water Bansong water purification plant. The results confirmed that wired Local Area Network (LAN) services give a higher security performance than an expensive commercial wireless LAN system. This was achieved by using an Internet Protocol (IP) address management system of wired networks and the packet filtering function of the Layer2 (L2) switch. This study also confirmed that it is possible to create a wireless LAN service that is 3.7 times faster than the existing LTE communication network.