Real-Time DNS Monitoring

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In the rapidly evolving landscape of network security and administration, the ability to monitor and analyze DNS traffic in real-time is invaluable. Golang, with its robust standard library and efficient concurrency model, provides an excellent platform for developing network monitoring tools. In this blog post, we explore how to implement a DNS traffic monitoring system using Golang. This system captures DNS queries on a network, counts domain request frequencies, and provides a real-time visualization through a web interface.

The utility of such a system spans several use cases from network security (detecting domain-based threats), system administration (ensuring internal DNS health), to software development (debugging domain resolution issues).

Below, we delve into a practical implementation using popular Go libraries such as gin-gonic/gin for the web server and google/gopacket for packet processing, which allow us to efficiently capture and analyze network traffic.

The provided Go code snippet sets up a basic DNS monitoring system that captures DNS packets on a network interface and provides a web interface to display the count of DNS queries per domain.

Imports and Global Variables:

import (
  "fmt"
  "log"
  "os"
  "sync"…