We call each incoming connection the filterConnection function in a separate goroutine to handle the connection asynchronously. We then create a network listener using the net.Listen function and start listening for incoming connections. In the main function, we first define the port that the firewall will listen on and the rules that will be used to filter traffic. The net package is used to handle network connections, and the os package is used to manage system-level functions.
In Go, several packages can be used to implement a firewall.
For example, you may want to block incoming traffic on specific ports, block traffic from specific IP addresses, or allow traffic only from specific IP addresses. These rules should be based on the specific needs of your network. The first step in building a firewall is to define the rules that will be used to filter network traffic. Go is a modern programming language gaining popularity for network programming, including building firewalls. This article will discuss how to implement a firewall using Go Lang. It acts as a barrier between a private internal network and the public internet, controlling incoming and outgoing traffic based on predetermined security rules. A firewall is a crucial network security tool that helps protect computers and networks from malicious attacks.
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