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# dns based ad/abuse domain blocking
A lot of people already use adblocker plugins within their desktop browsers, but what if you are using your (smart) phone, tablet, watch or any other wlan gadget...getting rid of annoying ads, trackers and other abuse sites (like facebook ;-) is simple: block them with your router. When the dns server on your router receives dns requests, you will sort out queries that ask for the resource records of ad servers and return a simple 'NXDOMAIN'. This is nothing but **N**on-e**X**istent Internet or Intranet domain name, if domain name is unable to resolved using the dns server, a condition called the 'NXDOMAIN' occurred.
## Main Features
* support of the following domain blocklist sources (free for private usage, for commercial use please check their individual licenses):
* => infrequent updates, approx. 400 entries (enabled by default)
* => numerous updates on the same day, approx. 12.000 entries
* => infrequent updates, approx. 15 entries
* => static local blacklist, located by default in '/etc/adblock/adblock.blacklist'
* => numerous updates on the same day, approx. 6.500 entries (enabled by default)
* => daily updates, approx. 4.500 entries