Well, you can block everything using a wildcard blocking rule (for that, go to "Filters → DNS blocklists" and add this custom rule: ||*^ ) and then you can allow the domain (and subdomains, if needed, for instance "everything.ycombinator.com"; for that, go to "Filters → Allowlist" and add this: @@||ycombinator.com^ )
Comments
Well, you can block everything using a wildcard blocking rule (for that, go to "Filters → DNS blocklists" and add this custom rule: ||*^ ) and then you can allow the domain (and subdomains, if needed, for instance "everything.ycombinator.com"; for that, go to "Filters → Allowlist" and add this: @@||ycombinator.com^ )
Alternatively, you can do something like this: *$denyallow=example.org|example.com
Blocks everything except example.org and example.com.
Works in AdGuard Home, AdGuard DNS or any other AG product with DNS filtering capabilities: https://adguard-dns.io/kb/general/dns-filtering-syntax/