Tag: Firewall

OPNsense DHCP — The DNS Handout Decision

OPNsense DHCP — The DNS Handout Decision

DHCP is the mechanism that makes every other DNS decision actually take effect. You can configure Unbound perfectly, deploy AdGuard with a clean compose file, and have a solid filtering policy — and none of it matters if clients are still pointing at whatever the router handed out six months ago.

Mar 9, 2026 4 min read
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OPNsense DHCP — Handing Out the Right DNS Servers

OPNsense DHCP — Handing Out the Right DNS Servers

DHCP is the part of the DNS stack nobody thinks about until clients are resolving through the wrong server. The filtering is configured, the resolver is running, the host overrides are in place — and clients are still querying 8.8.8.8 because the DHCP server never got updated. This

Mar 9, 2026 3 min read
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Unbound DNS on OPNsense — Local Resolver and Host Overrides

Unbound DNS on OPNsense — Local Resolver and Host Overrides

OPNsense ships with Unbound DNS enabled but barely configured. Out of the box it forwards to whatever system DNS is set, registers no local hostnames, and returns public IPs for services you're running locally. If you're pointing AdGuard — or any other DNS filter — upstream at your

Mar 9, 2026 3 min read
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