Firewall module using the Laravel framework:
Step 1: Create a Firewall Middleware Create a middleware class called FirewallMiddleware that will intercept incoming requests and apply the firewall rules. Here’s an example:
<?php
namespace App\Http\Middleware;
use Closure;
class FirewallMiddleware
{
private $allowedIPs = [
'127.0.0.1',
'192.168.0.1'
];
public function handle($request, Closure $next)
{
$clientIP = $request->ip();
if (!$this->isAllowedIP($clientIP)) {
return response('Forbidden', 403);
}
return $next($request);
}
private function isAllowedIP($clientIP)
{
return in_array($clientIP, $this->allowedIPs);
}
}
In this example, the FirewallMiddleware class checks if the client’s IP address is in the allowedIPs array. If it’s not, a 403 Forbidden response is returned. Otherwise, the request is passed to the next middleware or route handler.
Step 2: Register the Firewall Middleware In your Laravel application, register the FirewallMiddleware in the middleware stack. Open the app/Http/Kernel.php file and add the middleware to the $middleware property or a specific route group. Here’s an example:
protected $middleware = [
// Other middleware...
\App\Http\Middleware\FirewallMiddleware::class,
];
In this example, the FirewallMiddleware is added to the $middleware array, ensuring that it applies to all incoming requests. You can also add it to a specific route group or middleware group based on your requirements.
Step 3: Customize the Firewall Rules You can modify the allowedIPs array in the FirewallMiddleware class to include or exclude IP addresses based on your firewall rules. Add or remove IP addresses as needed.
Please note that this is a basic example of a firewall module, and you may need to customize it further based on your specific requirements, such as adding more advanced rules, integrating with a database of allowed IP addresses, or handling exceptions and error responses.