Middlware

middleware.py

from django.conf import settings
from django.http import Http404

class MeuMiddleware(object):
    
    def process_request(self, request):
        if request.META["REMOTE_ADDR"] in settings.IPS_PERMITIDOS:
            pass
        else:
            raise Http404

settings.py

IPS_PERMITIDOS = (
    "192.168.0.1", "192.168.0.2"
)

MIDDLEWARE_CLASSES = (
    ....
    "minha_app.middleware.MeuMiddleware"
)