Question about choosing a firewall?

Question

linux

Good afternoon.
Please tell me some programs for traffic management. To be more precise, it is necessary for users (Win7 machines) to block certain sites (social networks, entertainment resources, etc.) and traffic from various instant messengers (skype, ICQ, etc.) at a certain time.
I know about Squid, but I have no idea if it can block traffic at certain times (let's say from 9 to 12 and from 13 to 18) and how it works with https, web proxy and other encrypted traffic.

Answer 1

I fully support "Suntechnic Suntechnic ". Can you or not, that is the question? It is possible to do this on Windows through Kerio, it will be faster if it is difficult for you to deal with iptables. and if not, I can send a ready-made and working iptables script to the mail.

Answer 2

If you have Linux as a gateway, then look towards iptables
If as an OpenBSD or FreeBSD gateway, then look towards PF (IMHO the best option)

Answer 3

Skype will be extremely difficult to block)

Answer 4

Using a system unit with Linux as a gateway is archaism. If the organization is small, then buy Mikrotik (for example, RB750) and create the necessary rules for scheduled blocking there.

Answer 5

However, as already mentioned, if the gateway is still a machine with Linux, then iptables+cron.
Those. write basic rules for iptables and scripts that, when run by cron, change these rules at the time you need. Everything.