@vallum No, network range may not have changed, but IPs in it have changed around quite a bit. So yes, you can use a big hammer just try and hit everything with it, trying to match the correct IPs for the services. Or you can use a finer tool like a knife and cut out the services you actually want. Proxies are not that "hectic" but a finer tool for limiting access. And if that's what the OP is wanting to do, I'd have a look into it. Of course one can dismiss it as not worth the work and just go with IPs. Didn't say a thing against that. Just know, that blocking internet services today via brute-force IP usage, you'll get false positives, side effects etc. in blocking networks or hosts that are in use for multiple purposes.