I intend to configure a server as a gateway.
I'll use it to manage network users, as well as share the internet connection for this network.
I will not share the Internet with squid, but I still wanted to be able to establish rules of access, such as sites that can not be accessed.
How can I do this without using squid?
I consider squid an excellent software. My problem is not with the squid in particular, but with any kind of proxy, because I have clients that use a series of programs that simply can not access the Internet via proxy.
Rather to score my question negatively, you could put your points of view, and you might understand that this is a case study.