Adblock software in OpenWRT is a script running in your OpenWRT gateway to sort out those DNS queries that ask for the resources recrds of ad servers and return a simple ‘NSDOMAIN’. This action will make your browser not able to show those ads on the page you are surfing.

Topology

A simple topology to show you the position of OpenWRT Virtual machines I installed in VMWare Workstation. It is inside my Windows 2016 host connecting to a giga switch. Other devices in my home network, they are either connecting through WiFi or through wired connection to switch.

Prerequisites

  • OpenWrt, tested with the stable release series (19.07.x) and with the latest rolling snapshot releases. On turris devices it has been successfully tested with TurrisOS 5.1.x
  • A download utility with SSL support: ‘wget’, ‘uclient-fetch’ with one of the ‘libustream-*’ ssl libraries, ‘aria2c’ or ‘curl’ is required
  • Option: DNS Reporting, TCPDUMP or TCPDUMP-Mini installed
  • Client DNS pointing to OpenWRT

Installation Steps

From OpenWRT Luci Web GUI:

  • Click Update Lists from OpenWRT Web GUI – System – Software

  • Install adblock and luci-app-adblock
  • Install wget / Curl
  • Reboot OpenWRT
  • Browse to OpenWRT Web GUI – Services – Adblock

From Console or SSH Session:

  • Update your local opkg repository (opkg update)
  • Install ‘adblock’ (opkg install adblock). The adblock service is enabled by default
  • Install the LuCI companion package ‘luci-app-adblock’ (opkg install luci-app-adblock)
  • It’s strongly recommended to use the LuCI frontend to easily configure all aspects of adblock, the application is located in LuCI under the ‘Services’ menu
  • Update from a former adblock version is easy. During the update a backup is made of the old configuration ‘/etc/config/adblock-backup’ and replaced by the new config – that’s all

References

from Blogger http://blog.51sec.org/2021/03/install-adblock-in-your-openwrt-router.html

By Jon

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