What is luci-app-adg-dnslookup?

luci-app-adg-dnslookup is a plugin for OpenWrt, the operating system many home and small business routers run on. It adds a page to the router's web control panel, called LuCI, that automates a specific chore for people running AdGuard Home, a DNS-based ad and tracker blocker: keeping a list of domain names pointed at the correct local or region-specific IP addresses. Normally, making sure services like Google, Microsoft, or various CDNs resolve to nearby servers instead of distant ones means either running a separate Python script that calls a lot of APIs, or manually editing configuration files by hand. This plugin replaces both approaches. It looks up the current IP address for each domain you care about using a DNS server of your choosing, then pushes those results straight into AdGuard Home through its own API, so the rewrite rules stay accurate without any file editing. The plugin ships with a dashboard showing how many domains are tracked and when the last sync ran, a live log viewer, and a list manager where you can turn domain categories on or off. It comes preloaded with over 700 domains already grouped into categories like Google, Meta, Microsoft, various CDNs, cloud providers, developer tools, social networks, and streaming services, and you can edit any of these lists yourself. Syncing can be triggered manually or scheduled automatically every one, three, six, or twelve hours, or once a day. Installation is a short set of commands run on the router itself, using either the opkg or apk package manager depending on your OpenWrt version, followed by installing curl as a dependency. Configuration, including the AdGuard Home address and login details, is done either through the LuCI web interface or by editing a small configuration file directly. The project is released under the MIT license.