How to grant Internet access to another subnet?

Question

Computer networks

Good afternoon, I understand that in some circles my question will seem too simple, but I don’t understand how to solve it. There is a Zyxell usg 300 hardware gateway and two subnets, for example 192.168.0.0/24 and 192.168.1.0/24.
192.168.0.0/24 is a working subnet, 192.168.1.0/24 must be connected so that devices on both subnets do not see each other, and both subnets have access to the Internet. Please tell me the logic of this connection. I read articles on the Internet, but something I can not catch up with how to solve the problem.
PS Strongly do not kick
Thank you in advance for your participation!

Answer 1

You configure ACL on the gateway, that's all. On the Internet you allow, to each other - no.

Answer 2

There is functionality. There are several ways.
1. You drive both subnets into VLANs, set up gateways for them and configure routing by adding a rule in the configuration section - firewall that prohibits traffic between subnets.
2. Just hang up IP subnets on LAN + rule.
Whether vlan is necessary to you or not to solve to you.