What do you use to control traffic?

Question

System administration

Good day!
Dear, what do you use to control Internet traffic? Could you briefly describe the configuration of your server.
There is a ready-made solution Ideco, Kerio, but they are paid. I would like to use my brainchild, but the problem is that we have 30 users and a channel of only 2 Mbps, because of this we have to let through filters (blocking ads, shops, social networks, etc.), it will not be a problem to raise a VPN server, you definitely need to speed limit per user group and per user. Network screen. ClamAV antivirus. In principle, all this is in ready-made solutions, but they are paid, so it would be interesting to read about your solution based on Linux, I have little experience in this, I don’t know what software to use for this. There is a car under the gateway.

Answer 1

pfSense

Answer 2

squid, of course.
Groups, block lists. This is not easy to administer, I must say. As a screen - of course iptables - it is in any linux. clamav is also installed in almost any linux. I didn’t have to do a shaper, but I think it’s either part of iptables or a separate module.
It requires very direct hands and the ability to work independently :)