How To Create A Firewall Module In Django

Firewall module in Django:

Step 1: Create a Middleware Create a middleware class called FirewallMiddleware that will intercept incoming requests and apply firewall rules. Here’s an example:

					from django.http import HttpResponseForbidden

class FirewallMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        # Add your firewall rules here
        blocked_ips = ['', '']

        ip_address = self.get_client_ip(request)
        if ip_address in blocked_ips:
            return HttpResponseForbidden('Access denied.')

        response = self.get_response(request)
        return response

    def get_client_ip(self, request):
        x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
        if x_forwarded_for:
            ip = x_forwarded_for.split(',')[0]
            ip = request.META.get('REMOTE_ADDR')
        return ip

In this example, the FirewallMiddleware class intercepts each incoming request. It checks the client’s IP address against a list of blocked IPs. If the IP address is found in the blocked IPs list, it returns an HttpResponseForbidden response with the message “Access denied.” Otherwise, it allows the request to proceed.

The get_client_ip method is used to extract the client’s IP address from the request headers. It handles cases where the client’s IP is passed via the X-Forwarded-For header in case of a reverse proxy setup.

Step 2: Register the Firewall Middleware In your Django project, open the file and add the FirewallMiddleware to the MIDDLEWARE list:

    # Other middleware...

In this example, the FirewallMiddleware is added to the MIDDLEWARE list, ensuring that it applies to all incoming requests. You can also add it to a specific middleware group or adjust the order based on your requirements.

Step 3: Customize Firewall Rules You can customize the blocked_ips list in the FirewallMiddleware class to include the IP addresses you want to block. Additionally, you can implement more complex firewall rules based on your specific requirements, such as blocking specific user agents, countries, or patterns in the requested URLs.

Please note that this is a basic example of a firewall module in Django. It provides a starting point for implementing firewall rules, but you may need to customize it further based on your specific needs and the complexity of your firewall requirements.