Abstract
In this era of rapid development of network and computer technology, the potential dangers become more and more numerous. There are many security issues that are hidden and unobtrusive. Creating a computer firewall to defend against network security leaks is a necessity. Firewalls can be personal and make a match that is more in line with what is in mind. Firewalls must allow any necessary connections from application business and technical expertise through the firewall to ensure the integrity of the data network. For firewall pairings, Border network, Perimeter Network, and Internal Network are also necessary for impact. The firewall construction can also be made more secure by implementing it through WIFI IP address. Dynamic NAT, Static NAT and PAT are essential in firewall building, and they all aim at network address translation. When building a firewall, changing a specific IP address can monitor the own network and control the message delivery in terms of security.
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