Blocking sites on OpenVPN?

Question

linux

There is a VPS on which OpenVPN is raised, as well as a number of devices that connect to this VPN. There is a need to block certain sites (by domain or IP) when connecting via VPN, i.e. so that connected devices cannot access these sites. I searched the net for information, but could not find a clear answer to my question. Blocking through prescribing lines like 127.0.0.1 foo.bar in /etc/hosts does not help, neither does iptables. Does anyone have any experience? I do not know where to dig further.

Answer 1

iptables - show what you did, let's see why it didn't work.