Adblock first denies then allows request

[quen]

Dear all,

I have a weird problem with adblock. It stopped filtering ads a few weeks ago. I fiddled around with it and generated a fresh firmware image today and it still does not work. When I enable the DNS report I see that, first the request for the ad domain gets denied, and then immediatly afterwards a second request is allowed. This happens on all my clients, Mac and iPad.

I am currently on OpenWrt SNAPSHOT r22573-72780e3eac / LuCI Master git-23.104.28202-588c6a1, running on Linksys WRT1900ACS.

This is what the DNS report looks like:

This is my adblock config:

root@openwrt:~# cat /etc/config/adblock

config adblock 'global'
	option adb_debug '0'
	option adb_safesearch '0'
	option adb_dnsfilereset '0'
	option adb_mail '0'
	option adb_backup '1'
	option adb_dns 'dnsmasq'
	option adb_repiface 'br-lan'
	list adb_sources 'adaway'
	list adb_sources 'adguard'
	list adb_sources 'adguard_tracking'
	list adb_sources 'android_tracking'
	list adb_sources 'firetv_tracking'
	list adb_sources 'openphish'
	list adb_sources 'reg_de'
	list adb_sources 'yoyo'
	option adb_enabled '1'
	option adb_forcedns '1'
	option adb_fetchutil 'uclient-fetch'
	option adb_report '1'
	list adb_zonelist 'lan'

Any help is appreciated!

[sml156]

The first query uses adblock server you have configured and the second query uses DNS cache to answer, Still gives the same IP for both 0.0.0.0

[quen]

Thanks for the reply.

I found the mistake. I use a WiFi Access Point behind the OpenWRT router as well, and the Access Point apparently queried some public DNS server as a fallback for the adblock NX response from OpenWRT.