Update a DNS record via an HTTP GET request

dnsupdate.go

// Compile for the current platform with:
//   go build dnsupdate.go
// Cross-compile for Windows with:
//   GOOS=windows GOARCH=amd64 go build dnsupdate.go

package main

import (
	"fmt"
	"net/http"
)

// Replace [...] with the correct token for your DNS entry
const updateURL = "https://freedns.afraid.org/dynamic/update.php?[...]"

func main() {
	fmt.Println("Updating private DNS entry...")

	if _, err := http.Get(updateURL); err != nil {
		fmt.Println(err.Error())
	} else {
		fmt.Println("Private DNS entry updated!")
	}
}