How to make a blacklist at your proxy server

[aleksartamonov]

I want to forbid to go to some of sites while using my vpn proxy. I added dnsmasq-s for domains . But seems it doesn't work.

[fortuna]

You can write a StreamDialer or PacketDialer that fails for blocked websites.

Or use a DNS resolver that blocks the sites you want (e.g. NextDNS). You can use the HappyEyeballsStreamDialer with your resolver of choice.