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 = ['127.0.0.1', '192.168.0.1'] 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(',') else: 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.
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
settings.py file and add the
FirewallMiddleware to the
MIDDLEWARE = [ # Other middleware... 'myapp.middleware.FirewallMiddleware', ]
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.