Enforce safe search on Google, YouTube, Bing, and DuckDuckGo without a HTTP proxy. Instead, override DNS lookups, resolving to strict search server IP addresses. Works on IPv4 and IPv6 networks.
safe.duckduckgo.com while blocking other Duck Duck Go subdomains and the root.I wanted to enforce safe search on my home network. OpenDNS offers FamilyShield which blocks adult sites but they do not block explicit search results from Google, YouTube or Bing. Instead, OpenDNS support page details how to enforce safe search on Google, YouTube and Bing. Therefore, I needed to figure a workaround.
When performing lookup on www.google.com or any of its supported domains, DNS server resolves to the regular non-safe search version.
Instead of sending lookup requests to DNS servers, resolve to safe search IP addresses as below. Note that these are subject to change, correct as at 11th September 2017:
| Safe Search Service | CNAME | IPv4 | IPv4-over-IPv6 |
|---|---|---|---|
forcesafesearch.google.com | 216.239.38.120 | ::ffff:216.239.38.120 | |
| YouTube Strict | restrict.youtube.com | 216.239.38.120 | ::ffff:216.239.38.120 |
| YouTube Moderate | restrictmoderate.youtube.com | 216.239.38.119 | ::ffff:216.239.38.119 |
| Bing | strict.bing.com | 204.79.197.220 | ::ffff:204.79.197.220 |
| DuckDuckGo | safe.duckduckgo.com | 20.43.161.151 | ::ffff:20.43.161.151 |
Do not use these domains in web browsers directly. They are to be used only in DNS records. If you browse to forcesafesearch.google.com, you will land on a 404 page.
Service providers generally recommend referring to CNAME instead of IP as the latter may change. If you do not have an option, just refer to the IP address. When it breaks, you will know about it eventually.
There are no IPv6 addresses for safe search. As such, the workaround for the time being is to use IPv4-over-IPv6.
For OpenWRT users, jump to Using OpenWRT section below.
Alternatively, to use hosts file option, the solution is right below.
The hosts file should be available on most (if not all) operating systems. Administrator rights are required to edit this, which is a good thing as non-admins cannot tamper with it. i.e. parents with admin rights can pre-configure these for their kids where the latter do not have admin rights.
On Windows, it can be found at C:\Windows\System32\drivers\etc\hosts.
On Unix, Linux, Raspberry Pi Raspbian, it can be found at /etc/hosts.
The format of the file is <IP address> <host name>.
Note that the two fields are separated by space(s) or tab(s).
To capture domain names from Google supported domains, I used regular expression:
\.([\w\.]+)(?:\s)?
Then substitute with:
::ffff:216.239.38.120 $1 www.$1\n216.239.38.120 $1 www.$1\n
$1 denotes capture group 1.
Prefix it with www because that is absent in the capture.
If you are not into RegEx, that is fine. Here is the result:
::ffff:216.239.38.120 google.com www.google.com
216.239.38.120 google.com www.google.com
::ffff:216.239.38.120 google.ad www.google.ad
216.239.38.120 google.ad www.google.ad
::ffff:216.239.38.120 google.ae www.google.ae
216.239.38.120 google.ae www.google.ae
::ffff:216.239.38.120 google.com.af www.google.com.af
216.239.38.120 google.com.af www.google.com.af
::ffff:216.239.38.120 google.com.ag www.google.com.ag
216.239.38.120 google.com.ag www.google.com.ag
::ffff:216.239.38.120 google.com.ai www.google.com.ai
216.239.38.120 google.com.ai www.google.com.ai
::ffff:216.239.38.120 google.al www.google.al
216.239.38.120 google.al www.google.al
::ffff:216.239.38.120 google.am www.google.am
216.239.38.120 google.am www.google.am
::ffff:216.239.38.120 google.co.ao www.google.co.ao
216.239.38.120 google.co.ao www.google.co.ao
::ffff:216.239.38.120 google.com.ar www.google.com.ar
216.239.38.120 google.com.ar www.google.com.ar
::ffff:216.239.38.120 google.as www.google.as
216.239.38.120 google.as www.google.as
::ffff:216.239.38.120 google.at www.google.at
216.239.38.120 google.at www.google.at
::ffff:216.239.38.120 google.com.au www.google.com.au
216.239.38.120 google.com.au www.google.com.au
::ffff:216.239.38.120 google.az www.google.az
216.239.38.120 google.az www.google.az
::ffff:216.239.38.120 google.ba www.google.ba
216.239.38.120 google.ba www.google.ba
::ffff:216.239.38.120 google.com.bd www.google.com.bd
216.239.38.120 google.com.bd www.google.com.bd
::ffff:216.239.38.120 google.be www.google.be
216.239.38.120 google.be www.google.be
::ffff:216.239.38.120 google.bf www.google.bf
216.239.38.120 google.bf www.google.bf
::ffff:216.239.38.120 google.bg www.google.bg
216.239.38.120 google.bg www.google.bg
::ffff:216.239.38.120 google.com.bh www.google.com.bh
216.239.38.120 google.com.bh www.google.com.bh
::ffff:216.239.38.120 google.bi www.google.bi
216.239.38.120 google.bi www.google.bi
::ffff:216.239.38.120 google.bj www.google.bj
216.239.38.120 google.bj www.google.bj
::ffff:216.239.38.120 google.com.bn www.google.com.bn
216.239.38.120 google.com.bn www.google.com.bn
::ffff:216.239.38.120 google.com.bo www.google.com.bo
216.239.38.120 google.com.bo www.google.com.bo
::ffff:216.239.38.120 google.com.br www.google.com.br
216.239.38.120 google.com.br www.google.com.br
::ffff:216.239.38.120 google.bs www.google.bs
216.239.38.120 google.bs www.google.bs
::ffff:216.239.38.120 google.bt www.google.bt
216.239.38.120 google.bt www.google.bt
::ffff:216.239.38.120 google.co.bw www.google.co.bw
216.239.38.120 google.co.bw www.google.co.bw
::ffff:216.239.38.120 google.by www.google.by
216.239.38.120 google.by www.google.by
::ffff:216.239.38.120 google.com.bz www.google.com.bz
216.239.38.120 google.com.bz www.google.com.bz
::ffff:216.239.38.120 google.ca www.google.ca
216.239.38.120 google.ca www.google.ca
::ffff:216.239.38.120 google.cd www.google.cd
216.239.38.120 google.cd www.google.cd
::ffff:216.239.38.120 google.cf www.google.cf
216.239.38.120 google.cf www.google.cf
::ffff:216.239.38.120 google.cg www.google.cg
216.239.38.120 google.cg www.google.cg
::ffff:216.239.38.120 google.ch www.google.ch
216.239.38.120 google.ch www.google.ch
::ffff:216.239.38.120 google.ci www.google.ci
216.239.38.120 google.ci www.google.ci
::ffff:216.239.38.120 google.co.ck www.google.co.ck
216.239.38.120 google.co.ck www.google.co.ck
::ffff:216.239.38.120 google.cl www.google.cl
216.239.38.120 google.cl www.google.cl
::ffff:216.239.38.120 google.cm www.google.cm
216.239.38.120 google.cm www.google.cm
::ffff:216.239.38.120 google.cn www.google.cn
216.239.38.120 google.cn www.google.cn
::ffff:216.239.38.120 google.com.co www.google.com.co
216.239.38.120 google.com.co www.google.com.co
::ffff:216.239.38.120 google.co.cr www.google.co.cr
216.239.38.120 google.co.cr www.google.co.cr
::ffff:216.239.38.120 google.com.cu www.google.com.cu
216.239.38.120 google.com.cu www.google.com.cu
::ffff:216.239.38.120 google.cv www.google.cv
216.239.38.120 google.cv www.google.cv
::ffff:216.239.38.120 google.com.cy www.google.com.cy
216.239.38.120 google.com.cy www.google.com.cy
::ffff:216.239.38.120 google.cz www.google.cz
216.239.38.120 google.cz www.google.cz
::ffff:216.239.38.120 google.de www.google.de
216.239.38.120 google.de www.google.de
::ffff:216.239.38.120 google.dj www.google.dj
216.239.38.120 google.dj www.google.dj
::ffff:216.239.38.120 google.dk www.google.dk
216.239.38.120 google.dk www.google.dk
::ffff:216.239.38.120 google.dm www.google.dm
216.239.38.120 google.dm www.google.dm
::ffff:216.239.38.120 google.com.do www.google.com.do
216.239.38.120 google.com.do www.google.com.do
::ffff:216.239.38.120 google.dz www.google.dz
216.239.38.120 google.dz www.google.dz
::ffff:216.239.38.120 google.com.ec www.google.com.ec
216.239.38.120 google.com.ec www.google.com.ec
::ffff:216.239.38.120 google.ee www.google.ee
216.239.38.120 google.ee www.google.ee
::ffff:216.239.38.120 google.com.eg www.google.com.eg
216.239.38.120 google.com.eg www.google.com.eg
::ffff:216.239.38.120 google.es www.google.es
216.239.38.120 google.es www.google.es
::ffff:216.239.38.120 google.com.et www.google.com.et
216.239.38.120 google.com.et www.google.com.et
::ffff:216.239.38.120 google.fi www.google.fi
216.239.38.120 google.fi www.google.fi
::ffff:216.239.38.120 google.com.fj www.google.com.fj
216.239.38.120 google.com.fj www.google.com.fj
::ffff:216.239.38.120 google.fm www.google.fm
216.239.38.120 google.fm www.google.fm
::ffff:216.239.38.120 google.fr www.google.fr
216.239.38.120 google.fr www.google.fr
::ffff:216.239.38.120 google.ga www.google.ga
216.239.38.120 google.ga www.google.ga
::ffff:216.239.38.120 google.ge www.google.ge
216.239.38.120 google.ge www.google.ge
::ffff:216.239.38.120 google.gg www.google.gg
216.239.38.120 google.gg www.google.gg
::ffff:216.239.38.120 google.com.gh www.google.com.gh
216.239.38.120 google.com.gh www.google.com.gh
::ffff:216.239.38.120 google.com.gi www.google.com.gi
216.239.38.120 google.com.gi www.google.com.gi
::ffff:216.239.38.120 google.gl www.google.gl
216.239.38.120 google.gl www.google.gl
::ffff:216.239.38.120 google.gm www.google.gm
216.239.38.120 google.gm www.google.gm
::ffff:216.239.38.120 google.gp www.google.gp
216.239.38.120 google.gp www.google.gp
::ffff:216.239.38.120 google.gr www.google.gr
216.239.38.120 google.gr www.google.gr
::ffff:216.239.38.120 google.com.gt www.google.com.gt
216.239.38.120 google.com.gt www.google.com.gt
::ffff:216.239.38.120 google.gy www.google.gy
216.239.38.120 google.gy www.google.gy
::ffff:216.239.38.120 google.com.hk www.google.com.hk
216.239.38.120 google.com.hk www.google.com.hk
::ffff:216.239.38.120 google.hn www.google.hn
216.239.38.120 google.hn www.google.hn
::ffff:216.239.38.120 google.hr www.google.hr
216.239.38.120 google.hr www.google.hr
::ffff:216.239.38.120 google.ht www.google.ht
216.239.38.120 google.ht www.google.ht
::ffff:216.239.38.120 google.hu www.google.hu
216.239.38.120 google.hu www.google.hu
::ffff:216.239.38.120 google.co.id www.google.co.id
216.239.38.120 google.co.id www.google.co.id
::ffff:216.239.38.120 google.ie www.google.ie
216.239.38.120 google.ie www.google.ie
::ffff:216.239.38.120 google.co.il www.google.co.il
216.239.38.120 google.co.il www.google.co.il
::ffff:216.239.38.120 google.im www.google.im
216.239.38.120 google.im www.google.im
::ffff:216.239.38.120 google.co.in www.google.co.in
216.239.38.120 google.co.in www.google.co.in
::ffff:216.239.38.120 google.iq www.google.iq
216.239.38.120 google.iq www.google.iq
::ffff:216.239.38.120 google.is www.google.is
216.239.38.120 google.is www.google.is
::ffff:216.239.38.120 google.it www.google.it
216.239.38.120 google.it www.google.it
::ffff:216.239.38.120 google.je www.google.je
216.239.38.120 google.je www.google.je
::ffff:216.239.38.120 google.com.jm www.google.com.jm
216.239.38.120 google.com.jm www.google.com.jm
::ffff:216.239.38.120 google.jo www.google.jo
216.239.38.120 google.jo www.google.jo
::ffff:216.239.38.120 google.co.jp www.google.co.jp
216.239.38.120 google.co.jp www.google.co.jp
::ffff:216.239.38.120 google.co.ke www.google.co.ke
216.239.38.120 google.co.ke www.google.co.ke
::ffff:216.239.38.120 google.com.kh www.google.com.kh
216.239.38.120 google.com.kh www.google.com.kh
::ffff:216.239.38.120 google.ki www.google.ki
216.239.38.120 google.ki www.google.ki
::ffff:216.239.38.120 google.kg www.google.kg
216.239.38.120 google.kg www.google.kg
::ffff:216.239.38.120 google.co.kr www.google.co.kr
216.239.38.120 google.co.kr www.google.co.kr
::ffff:216.239.38.120 google.com.kw www.google.com.kw
216.239.38.120 google.com.kw www.google.com.kw
::ffff:216.239.38.120 google.kz www.google.kz
216.239.38.120 google.kz www.google.kz
::ffff:216.239.38.120 google.la www.google.la
216.239.38.120 google.la www.google.la
::ffff:216.239.38.120 google.com.lb www.google.com.lb
216.239.38.120 google.com.lb www.google.com.lb
::ffff:216.239.38.120 google.li www.google.li
216.239.38.120 google.li www.google.li
::ffff:216.239.38.120 google.lk www.google.lk
216.239.38.120 google.lk www.google.lk
::ffff:216.239.38.120 google.co.ls www.google.co.ls
216.239.38.120 google.co.ls www.google.co.ls
::ffff:216.239.38.120 google.lt www.google.lt
216.239.38.120 google.lt www.google.lt
::ffff:216.239.38.120 google.lu www.google.lu
216.239.38.120 google.lu www.google.lu
::ffff:216.239.38.120 google.lv www.google.lv
216.239.38.120 google.lv www.google.lv
::ffff:216.239.38.120 google.com.ly www.google.com.ly
216.239.38.120 google.com.ly www.google.com.ly
::ffff:216.239.38.120 google.co.ma www.google.co.ma
216.239.38.120 google.co.ma www.google.co.ma
::ffff:216.239.38.120 google.md www.google.md
216.239.38.120 google.md www.google.md
::ffff:216.239.38.120 google.me www.google.me
216.239.38.120 google.me www.google.me
::ffff:216.239.38.120 google.mg www.google.mg
216.239.38.120 google.mg www.google.mg
::ffff:216.239.38.120 google.mk www.google.mk
216.239.38.120 google.mk www.google.mk
::ffff:216.239.38.120 google.ml www.google.ml
216.239.38.120 google.ml www.google.ml
::ffff:216.239.38.120 google.com.mm www.google.com.mm
216.239.38.120 google.com.mm www.google.com.mm
::ffff:216.239.38.120 google.mn www.google.mn
216.239.38.120 google.mn www.google.mn
::ffff:216.239.38.120 google.ms www.google.ms
216.239.38.120 google.ms www.google.ms
::ffff:216.239.38.120 google.com.mt www.google.com.mt
216.239.38.120 google.com.mt www.google.com.mt
::ffff:216.239.38.120 google.mu www.google.mu
216.239.38.120 google.mu www.google.mu
::ffff:216.239.38.120 google.mv www.google.mv
216.239.38.120 google.mv www.google.mv
::ffff:216.239.38.120 google.mw www.google.mw
216.239.38.120 google.mw www.google.mw
::ffff:216.239.38.120 google.com.mx www.google.com.mx
216.239.38.120 google.com.mx www.google.com.mx
::ffff:216.239.38.120 google.com.my www.google.com.my
216.239.38.120 google.com.my www.google.com.my
::ffff:216.239.38.120 google.co.mz www.google.co.mz
216.239.38.120 google.co.mz www.google.co.mz
::ffff:216.239.38.120 google.com.na www.google.com.na
216.239.38.120 google.com.na www.google.com.na
::ffff:216.239.38.120 google.com.nf www.google.com.nf
216.239.38.120 google.com.nf www.google.com.nf
::ffff:216.239.38.120 google.com.ng www.google.com.ng
216.239.38.120 google.com.ng www.google.com.ng
::ffff:216.239.38.120 google.com.ni www.google.com.ni
216.239.38.120 google.com.ni www.google.com.ni
::ffff:216.239.38.120 google.ne www.google.ne
216.239.38.120 google.ne www.google.ne
::ffff:216.239.38.120 google.nl www.google.nl
216.239.38.120 google.nl www.google.nl
::ffff:216.239.38.120 google.no www.google.no
216.239.38.120 google.no www.google.no
::ffff:216.239.38.120 google.com.np www.google.com.np
216.239.38.120 google.com.np www.google.com.np
::ffff:216.239.38.120 google.nr www.google.nr
216.239.38.120 google.nr www.google.nr
::ffff:216.239.38.120 google.nu www.google.nu
216.239.38.120 google.nu www.google.nu
::ffff:216.239.38.120 google.co.nz www.google.co.nz
216.239.38.120 google.co.nz www.google.co.nz
::ffff:216.239.38.120 google.com.om www.google.com.om
216.239.38.120 google.com.om www.google.com.om
::ffff:216.239.38.120 google.com.pa www.google.com.pa
216.239.38.120 google.com.pa www.google.com.pa
::ffff:216.239.38.120 google.com.pe www.google.com.pe
216.239.38.120 google.com.pe www.google.com.pe
::ffff:216.239.38.120 google.com.pg www.google.com.pg
216.239.38.120 google.com.pg www.google.com.pg
::ffff:216.239.38.120 google.com.ph www.google.com.ph
216.239.38.120 google.com.ph www.google.com.ph
::ffff:216.239.38.120 google.com.pk www.google.com.pk
216.239.38.120 google.com.pk www.google.com.pk
::ffff:216.239.38.120 google.pl www.google.pl
216.239.38.120 google.pl www.google.pl
::ffff:216.239.38.120 google.pn www.google.pn
216.239.38.120 google.pn www.google.pn
::ffff:216.239.38.120 google.com.pr www.google.com.pr
216.239.38.120 google.com.pr www.google.com.pr
::ffff:216.239.38.120 google.ps www.google.ps
216.239.38.120 google.ps www.google.ps
::ffff:216.239.38.120 google.pt www.google.pt
216.239.38.120 google.pt www.google.pt
::ffff:216.239.38.120 google.com.py www.google.com.py
216.239.38.120 google.com.py www.google.com.py
::ffff:216.239.38.120 google.com.qa www.google.com.qa
216.239.38.120 google.com.qa www.google.com.qa
::ffff:216.239.38.120 google.ro www.google.ro
216.239.38.120 google.ro www.google.ro
::ffff:216.239.38.120 google.ru www.google.ru
216.239.38.120 google.ru www.google.ru
::ffff:216.239.38.120 google.rw www.google.rw
216.239.38.120 google.rw www.google.rw
::ffff:216.239.38.120 google.com.sa www.google.com.sa
216.239.38.120 google.com.sa www.google.com.sa
::ffff:216.239.38.120 google.com.sb www.google.com.sb
216.239.38.120 google.com.sb www.google.com.sb
::ffff:216.239.38.120 google.sc www.google.sc
216.239.38.120 google.sc www.google.sc
::ffff:216.239.38.120 google.se www.google.se
216.239.38.120 google.se www.google.se
::ffff:216.239.38.120 google.com.sg www.google.com.sg
216.239.38.120 google.com.sg www.google.com.sg
::ffff:216.239.38.120 google.sh www.google.sh
216.239.38.120 google.sh www.google.sh
::ffff:216.239.38.120 google.si www.google.si
216.239.38.120 google.si www.google.si
::ffff:216.239.38.120 google.sk www.google.sk
216.239.38.120 google.sk www.google.sk
::ffff:216.239.38.120 google.com.sl www.google.com.sl
216.239.38.120 google.com.sl www.google.com.sl
::ffff:216.239.38.120 google.sn www.google.sn
216.239.38.120 google.sn www.google.sn
::ffff:216.239.38.120 google.so www.google.so
216.239.38.120 google.so www.google.so
::ffff:216.239.38.120 google.sm www.google.sm
216.239.38.120 google.sm www.google.sm
::ffff:216.239.38.120 google.sr www.google.sr
216.239.38.120 google.sr www.google.sr
::ffff:216.239.38.120 google.st www.google.st
216.239.38.120 google.st www.google.st
::ffff:216.239.38.120 google.com.sv www.google.com.sv
216.239.38.120 google.com.sv www.google.com.sv
::ffff:216.239.38.120 google.td www.google.td
216.239.38.120 google.td www.google.td
::ffff:216.239.38.120 google.tg www.google.tg
216.239.38.120 google.tg www.google.tg
::ffff:216.239.38.120 google.co.th www.google.co.th
216.239.38.120 google.co.th www.google.co.th
::ffff:216.239.38.120 google.com.tj www.google.com.tj
216.239.38.120 google.com.tj www.google.com.tj
::ffff:216.239.38.120 google.tk www.google.tk
216.239.38.120 google.tk www.google.tk
::ffff:216.239.38.120 google.tl www.google.tl
216.239.38.120 google.tl www.google.tl
::ffff:216.239.38.120 google.tm www.google.tm
216.239.38.120 google.tm www.google.tm
::ffff:216.239.38.120 google.tn www.google.tn
216.239.38.120 google.tn www.google.tn
::ffff:216.239.38.120 google.to www.google.to
216.239.38.120 google.to www.google.to
::ffff:216.239.38.120 google.com.tr www.google.com.tr
216.239.38.120 google.com.tr www.google.com.tr
::ffff:216.239.38.120 google.tt www.google.tt
216.239.38.120 google.tt www.google.tt
::ffff:216.239.38.120 google.com.tw www.google.com.tw
216.239.38.120 google.com.tw www.google.com.tw
::ffff:216.239.38.120 google.co.tz www.google.co.tz
216.239.38.120 google.co.tz www.google.co.tz
::ffff:216.239.38.120 google.com.ua www.google.com.ua
216.239.38.120 google.com.ua www.google.com.ua
::ffff:216.239.38.120 google.co.ug www.google.co.ug
216.239.38.120 google.co.ug www.google.co.ug
::ffff:216.239.38.120 google.co.uk www.google.co.uk
216.239.38.120 google.co.uk www.google.co.uk
::ffff:216.239.38.120 google.com.uy www.google.com.uy
216.239.38.120 google.com.uy www.google.com.uy
::ffff:216.239.38.120 google.co.uz www.google.co.uz
216.239.38.120 google.co.uz www.google.co.uz
::ffff:216.239.38.120 google.com.vc www.google.com.vc
216.239.38.120 google.com.vc www.google.com.vc
::ffff:216.239.38.120 google.co.ve www.google.co.ve
216.239.38.120 google.co.ve www.google.co.ve
::ffff:216.239.38.120 google.vg www.google.vg
216.239.38.120 google.vg www.google.vg
::ffff:216.239.38.120 google.co.vi www.google.co.vi
216.239.38.120 google.co.vi www.google.co.vi
::ffff:216.239.38.120 google.com.vn www.google.com.vn
216.239.38.120 google.com.vn www.google.com.vn
::ffff:216.239.38.120 google.vu www.google.vu
216.239.38.120 google.vu www.google.vu
::ffff:216.239.38.120 google.ws www.google.ws
216.239.38.120 google.ws www.google.ws
::ffff:216.239.38.120 google.rs www.google.rs
216.239.38.120 google.rs www.google.rs
::ffff:216.239.38.120 google.co.za www.google.co.za
216.239.38.120 google.co.za www.google.co.za
::ffff:216.239.38.120 google.co.zm www.google.co.zm
216.239.38.120 google.co.zm www.google.co.zm
::ffff:216.239.38.120 google.co.zw www.google.co.zw
216.239.38.120 google.co.zw www.google.co.zw
::ffff:216.239.38.120 google.cat www.google.cat
216.239.38.120 google.cat www.google.cat
Copy the the above into your hosts file. Then flush your DNS cache.
On Windows, ipconfig /flushdns.
Your browser may have its own DNS cache, restart it.
To test it, simply browse to Google and type in explicit words to see if adult content appears.
For YouTube, append the following into your hosts file:
::ffff:216.239.38.120 youtube.com www.youtube.com m.youtube.com youtubei.googleapis.com youtube.googleapis.com youtube-nocookie.com www.youtube-nocookie.com
216.239.38.120 youtube.com www.youtube.com m.youtube.com youtubei.googleapis.com youtube.googleapis.com youtube-nocookie.com www.youtube-nocookie.com
Use 216.239.38.119 if you prefer moderate restrictions.
For Bing, append the following into your hosts file:
::ffff:204.79.197.220 bing.com www.bing.com
204.79.197.220 bing.com www.bing.com
I am using dnsmasq-full version 2.73-1 on OpenWRT Chaos Calmer 15.05.1 instead of the default dnsmasq. The solution described below should also work with the latter. Otherwise, please install the full version.
Edit /etc/dnsmasq.conf and add lines formatted as cname=<target>,<cname>.
To produce that format using Regex:
cname=$1,forcesafesearch.google.com\ncname=www.$1,forcesafesearch.google.com\n
If you want just the output, here it is:
# Google safe search
cname=google.com,forcesafesearch.google.com
cname=www.google.com,forcesafesearch.google.com
cname=google.ad,forcesafesearch.google.com
cname=www.google.ad,forcesafesearch.google.com
cname=google.ae,forcesafesearch.google.com
cname=www.google.ae,forcesafesearch.google.com
cname=google.com.af,forcesafesearch.google.com
cname=www.google.com.af,forcesafesearch.google.com
cname=google.com.ag,forcesafesearch.google.com
cname=www.google.com.ag,forcesafesearch.google.com
cname=google.com.ai,forcesafesearch.google.com
cname=www.google.com.ai,forcesafesearch.google.com
cname=google.al,forcesafesearch.google.com
cname=www.google.al,forcesafesearch.google.com
cname=google.am,forcesafesearch.google.com
cname=www.google.am,forcesafesearch.google.com
cname=google.co.ao,forcesafesearch.google.com
cname=www.google.co.ao,forcesafesearch.google.com
cname=google.com.ar,forcesafesearch.google.com
cname=www.google.com.ar,forcesafesearch.google.com
cname=google.as,forcesafesearch.google.com
cname=www.google.as,forcesafesearch.google.com
cname=google.at,forcesafesearch.google.com
cname=www.google.at,forcesafesearch.google.com
cname=google.com.au,forcesafesearch.google.com
cname=www.google.com.au,forcesafesearch.google.com
cname=google.az,forcesafesearch.google.com
cname=www.google.az,forcesafesearch.google.com
cname=google.ba,forcesafesearch.google.com
cname=www.google.ba,forcesafesearch.google.com
cname=google.com.bd,forcesafesearch.google.com
cname=www.google.com.bd,forcesafesearch.google.com
cname=google.be,forcesafesearch.google.com
cname=www.google.be,forcesafesearch.google.com
cname=google.bf,forcesafesearch.google.com
cname=www.google.bf,forcesafesearch.google.com
cname=google.bg,forcesafesearch.google.com
cname=www.google.bg,forcesafesearch.google.com
cname=google.com.bh,forcesafesearch.google.com
cname=www.google.com.bh,forcesafesearch.google.com
cname=google.bi,forcesafesearch.google.com
cname=www.google.bi,forcesafesearch.google.com
cname=google.bj,forcesafesearch.google.com
cname=www.google.bj,forcesafesearch.google.com
cname=google.com.bn,forcesafesearch.google.com
cname=www.google.com.bn,forcesafesearch.google.com
cname=google.com.bo,forcesafesearch.google.com
cname=www.google.com.bo,forcesafesearch.google.com
cname=google.com.br,forcesafesearch.google.com
cname=www.google.com.br,forcesafesearch.google.com
cname=google.bs,forcesafesearch.google.com
cname=www.google.bs,forcesafesearch.google.com
cname=google.bt,forcesafesearch.google.com
cname=www.google.bt,forcesafesearch.google.com
cname=google.co.bw,forcesafesearch.google.com
cname=www.google.co.bw,forcesafesearch.google.com
cname=google.by,forcesafesearch.google.com
cname=www.google.by,forcesafesearch.google.com
cname=google.com.bz,forcesafesearch.google.com
cname=www.google.com.bz,forcesafesearch.google.com
cname=google.ca,forcesafesearch.google.com
cname=www.google.ca,forcesafesearch.google.com
cname=google.cd,forcesafesearch.google.com
cname=www.google.cd,forcesafesearch.google.com
cname=google.cf,forcesafesearch.google.com
cname=www.google.cf,forcesafesearch.google.com
cname=google.cg,forcesafesearch.google.com
cname=www.google.cg,forcesafesearch.google.com
cname=google.ch,forcesafesearch.google.com
cname=www.google.ch,forcesafesearch.google.com
cname=google.ci,forcesafesearch.google.com
cname=www.google.ci,forcesafesearch.google.com
cname=google.co.ck,forcesafesearch.google.com
cname=www.google.co.ck,forcesafesearch.google.com
cname=google.cl,forcesafesearch.google.com
cname=www.google.cl,forcesafesearch.google.com
cname=google.cm,forcesafesearch.google.com
cname=www.google.cm,forcesafesearch.google.com
cname=google.cn,forcesafesearch.google.com
cname=www.google.cn,forcesafesearch.google.com
cname=google.com.co,forcesafesearch.google.com
cname=www.google.com.co,forcesafesearch.google.com
cname=google.co.cr,forcesafesearch.google.com
cname=www.google.co.cr,forcesafesearch.google.com
cname=google.com.cu,forcesafesearch.google.com
cname=www.google.com.cu,forcesafesearch.google.com
cname=google.cv,forcesafesearch.google.com
cname=www.google.cv,forcesafesearch.google.com
cname=google.com.cy,forcesafesearch.google.com
cname=www.google.com.cy,forcesafesearch.google.com
cname=google.cz,forcesafesearch.google.com
cname=www.google.cz,forcesafesearch.google.com
cname=google.de,forcesafesearch.google.com
cname=www.google.de,forcesafesearch.google.com
cname=google.dj,forcesafesearch.google.com
cname=www.google.dj,forcesafesearch.google.com
cname=google.dk,forcesafesearch.google.com
cname=www.google.dk,forcesafesearch.google.com
cname=google.dm,forcesafesearch.google.com
cname=www.google.dm,forcesafesearch.google.com
cname=google.com.do,forcesafesearch.google.com
cname=www.google.com.do,forcesafesearch.google.com
cname=google.dz,forcesafesearch.google.com
cname=www.google.dz,forcesafesearch.google.com
cname=google.com.ec,forcesafesearch.google.com
cname=www.google.com.ec,forcesafesearch.google.com
cname=google.ee,forcesafesearch.google.com
cname=www.google.ee,forcesafesearch.google.com
cname=google.com.eg,forcesafesearch.google.com
cname=www.google.com.eg,forcesafesearch.google.com
cname=google.es,forcesafesearch.google.com
cname=www.google.es,forcesafesearch.google.com
cname=google.com.et,forcesafesearch.google.com
cname=www.google.com.et,forcesafesearch.google.com
cname=google.fi,forcesafesearch.google.com
cname=www.google.fi,forcesafesearch.google.com
cname=google.com.fj,forcesafesearch.google.com
cname=www.google.com.fj,forcesafesearch.google.com
cname=google.fm,forcesafesearch.google.com
cname=www.google.fm,forcesafesearch.google.com
cname=google.fr,forcesafesearch.google.com
cname=www.google.fr,forcesafesearch.google.com
cname=google.ga,forcesafesearch.google.com
cname=www.google.ga,forcesafesearch.google.com
cname=google.ge,forcesafesearch.google.com
cname=www.google.ge,forcesafesearch.google.com
cname=google.gg,forcesafesearch.google.com
cname=www.google.gg,forcesafesearch.google.com
cname=google.com.gh,forcesafesearch.google.com
cname=www.google.com.gh,forcesafesearch.google.com
cname=google.com.gi,forcesafesearch.google.com
cname=www.google.com.gi,forcesafesearch.google.com
cname=google.gl,forcesafesearch.google.com
cname=www.google.gl,forcesafesearch.google.com
cname=google.gm,forcesafesearch.google.com
cname=www.google.gm,forcesafesearch.google.com
cname=google.gp,forcesafesearch.google.com
cname=www.google.gp,forcesafesearch.google.com
cname=google.gr,forcesafesearch.google.com
cname=www.google.gr,forcesafesearch.google.com
cname=google.com.gt,forcesafesearch.google.com
cname=www.google.com.gt,forcesafesearch.google.com
cname=google.gy,forcesafesearch.google.com
cname=www.google.gy,forcesafesearch.google.com
cname=google.com.hk,forcesafesearch.google.com
cname=www.google.com.hk,forcesafesearch.google.com
cname=google.hn,forcesafesearch.google.com
cname=www.google.hn,forcesafesearch.google.com
cname=google.hr,forcesafesearch.google.com
cname=www.google.hr,forcesafesearch.google.com
cname=google.ht,forcesafesearch.google.com
cname=www.google.ht,forcesafesearch.google.com
cname=google.hu,forcesafesearch.google.com
cname=www.google.hu,forcesafesearch.google.com
cname=google.co.id,forcesafesearch.google.com
cname=www.google.co.id,forcesafesearch.google.com
cname=google.ie,forcesafesearch.google.com
cname=www.google.ie,forcesafesearch.google.com
cname=google.co.il,forcesafesearch.google.com
cname=www.google.co.il,forcesafesearch.google.com
cname=google.im,forcesafesearch.google.com
cname=www.google.im,forcesafesearch.google.com
cname=google.co.in,forcesafesearch.google.com
cname=www.google.co.in,forcesafesearch.google.com
cname=google.iq,forcesafesearch.google.com
cname=www.google.iq,forcesafesearch.google.com
cname=google.is,forcesafesearch.google.com
cname=www.google.is,forcesafesearch.google.com
cname=google.it,forcesafesearch.google.com
cname=www.google.it,forcesafesearch.google.com
cname=google.je,forcesafesearch.google.com
cname=www.google.je,forcesafesearch.google.com
cname=google.com.jm,forcesafesearch.google.com
cname=www.google.com.jm,forcesafesearch.google.com
cname=google.jo,forcesafesearch.google.com
cname=www.google.jo,forcesafesearch.google.com
cname=google.co.jp,forcesafesearch.google.com
cname=www.google.co.jp,forcesafesearch.google.com
cname=google.co.ke,forcesafesearch.google.com
cname=www.google.co.ke,forcesafesearch.google.com
cname=google.com.kh,forcesafesearch.google.com
cname=www.google.com.kh,forcesafesearch.google.com
cname=google.ki,forcesafesearch.google.com
cname=www.google.ki,forcesafesearch.google.com
cname=google.kg,forcesafesearch.google.com
cname=www.google.kg,forcesafesearch.google.com
cname=google.co.kr,forcesafesearch.google.com
cname=www.google.co.kr,forcesafesearch.google.com
cname=google.com.kw,forcesafesearch.google.com
cname=www.google.com.kw,forcesafesearch.google.com
cname=google.kz,forcesafesearch.google.com
cname=www.google.kz,forcesafesearch.google.com
cname=google.la,forcesafesearch.google.com
cname=www.google.la,forcesafesearch.google.com
cname=google.com.lb,forcesafesearch.google.com
cname=www.google.com.lb,forcesafesearch.google.com
cname=google.li,forcesafesearch.google.com
cname=www.google.li,forcesafesearch.google.com
cname=google.lk,forcesafesearch.google.com
cname=www.google.lk,forcesafesearch.google.com
cname=google.co.ls,forcesafesearch.google.com
cname=www.google.co.ls,forcesafesearch.google.com
cname=google.lt,forcesafesearch.google.com
cname=www.google.lt,forcesafesearch.google.com
cname=google.lu,forcesafesearch.google.com
cname=www.google.lu,forcesafesearch.google.com
cname=google.lv,forcesafesearch.google.com
cname=www.google.lv,forcesafesearch.google.com
cname=google.com.ly,forcesafesearch.google.com
cname=www.google.com.ly,forcesafesearch.google.com
cname=google.co.ma,forcesafesearch.google.com
cname=www.google.co.ma,forcesafesearch.google.com
cname=google.md,forcesafesearch.google.com
cname=www.google.md,forcesafesearch.google.com
cname=google.me,forcesafesearch.google.com
cname=www.google.me,forcesafesearch.google.com
cname=google.mg,forcesafesearch.google.com
cname=www.google.mg,forcesafesearch.google.com
cname=google.mk,forcesafesearch.google.com
cname=www.google.mk,forcesafesearch.google.com
cname=google.ml,forcesafesearch.google.com
cname=www.google.ml,forcesafesearch.google.com
cname=google.com.mm,forcesafesearch.google.com
cname=www.google.com.mm,forcesafesearch.google.com
cname=google.mn,forcesafesearch.google.com
cname=www.google.mn,forcesafesearch.google.com
cname=google.ms,forcesafesearch.google.com
cname=www.google.ms,forcesafesearch.google.com
cname=google.com.mt,forcesafesearch.google.com
cname=www.google.com.mt,forcesafesearch.google.com
cname=google.mu,forcesafesearch.google.com
cname=www.google.mu,forcesafesearch.google.com
cname=google.mv,forcesafesearch.google.com
cname=www.google.mv,forcesafesearch.google.com
cname=google.mw,forcesafesearch.google.com
cname=www.google.mw,forcesafesearch.google.com
cname=google.com.mx,forcesafesearch.google.com
cname=www.google.com.mx,forcesafesearch.google.com
cname=google.com.my,forcesafesearch.google.com
cname=www.google.com.my,forcesafesearch.google.com
cname=google.co.mz,forcesafesearch.google.com
cname=www.google.co.mz,forcesafesearch.google.com
cname=google.com.na,forcesafesearch.google.com
cname=www.google.com.na,forcesafesearch.google.com
cname=google.com.nf,forcesafesearch.google.com
cname=www.google.com.nf,forcesafesearch.google.com
cname=google.com.ng,forcesafesearch.google.com
cname=www.google.com.ng,forcesafesearch.google.com
cname=google.com.ni,forcesafesearch.google.com
cname=www.google.com.ni,forcesafesearch.google.com
cname=google.ne,forcesafesearch.google.com
cname=www.google.ne,forcesafesearch.google.com
cname=google.nl,forcesafesearch.google.com
cname=www.google.nl,forcesafesearch.google.com
cname=google.no,forcesafesearch.google.com
cname=www.google.no,forcesafesearch.google.com
cname=google.com.np,forcesafesearch.google.com
cname=www.google.com.np,forcesafesearch.google.com
cname=google.nr,forcesafesearch.google.com
cname=www.google.nr,forcesafesearch.google.com
cname=google.nu,forcesafesearch.google.com
cname=www.google.nu,forcesafesearch.google.com
cname=google.co.nz,forcesafesearch.google.com
cname=www.google.co.nz,forcesafesearch.google.com
cname=google.com.om,forcesafesearch.google.com
cname=www.google.com.om,forcesafesearch.google.com
cname=google.com.pa,forcesafesearch.google.com
cname=www.google.com.pa,forcesafesearch.google.com
cname=google.com.pe,forcesafesearch.google.com
cname=www.google.com.pe,forcesafesearch.google.com
cname=google.com.pg,forcesafesearch.google.com
cname=www.google.com.pg,forcesafesearch.google.com
cname=google.com.ph,forcesafesearch.google.com
cname=www.google.com.ph,forcesafesearch.google.com
cname=google.com.pk,forcesafesearch.google.com
cname=www.google.com.pk,forcesafesearch.google.com
cname=google.pl,forcesafesearch.google.com
cname=www.google.pl,forcesafesearch.google.com
cname=google.pn,forcesafesearch.google.com
cname=www.google.pn,forcesafesearch.google.com
cname=google.com.pr,forcesafesearch.google.com
cname=www.google.com.pr,forcesafesearch.google.com
cname=google.ps,forcesafesearch.google.com
cname=www.google.ps,forcesafesearch.google.com
cname=google.pt,forcesafesearch.google.com
cname=www.google.pt,forcesafesearch.google.com
cname=google.com.py,forcesafesearch.google.com
cname=www.google.com.py,forcesafesearch.google.com
cname=google.com.qa,forcesafesearch.google.com
cname=www.google.com.qa,forcesafesearch.google.com
cname=google.ro,forcesafesearch.google.com
cname=www.google.ro,forcesafesearch.google.com
cname=google.ru,forcesafesearch.google.com
cname=www.google.ru,forcesafesearch.google.com
cname=google.rw,forcesafesearch.google.com
cname=www.google.rw,forcesafesearch.google.com
cname=google.com.sa,forcesafesearch.google.com
cname=www.google.com.sa,forcesafesearch.google.com
cname=google.com.sb,forcesafesearch.google.com
cname=www.google.com.sb,forcesafesearch.google.com
cname=google.sc,forcesafesearch.google.com
cname=www.google.sc,forcesafesearch.google.com
cname=google.se,forcesafesearch.google.com
cname=www.google.se,forcesafesearch.google.com
cname=google.com.sg,forcesafesearch.google.com
cname=www.google.com.sg,forcesafesearch.google.com
cname=google.sh,forcesafesearch.google.com
cname=www.google.sh,forcesafesearch.google.com
cname=google.si,forcesafesearch.google.com
cname=www.google.si,forcesafesearch.google.com
cname=google.sk,forcesafesearch.google.com
cname=www.google.sk,forcesafesearch.google.com
cname=google.com.sl,forcesafesearch.google.com
cname=www.google.com.sl,forcesafesearch.google.com
cname=google.sn,forcesafesearch.google.com
cname=www.google.sn,forcesafesearch.google.com
cname=google.so,forcesafesearch.google.com
cname=www.google.so,forcesafesearch.google.com
cname=google.sm,forcesafesearch.google.com
cname=www.google.sm,forcesafesearch.google.com
cname=google.sr,forcesafesearch.google.com
cname=www.google.sr,forcesafesearch.google.com
cname=google.st,forcesafesearch.google.com
cname=www.google.st,forcesafesearch.google.com
cname=google.com.sv,forcesafesearch.google.com
cname=www.google.com.sv,forcesafesearch.google.com
cname=google.td,forcesafesearch.google.com
cname=www.google.td,forcesafesearch.google.com
cname=google.tg,forcesafesearch.google.com
cname=www.google.tg,forcesafesearch.google.com
cname=google.co.th,forcesafesearch.google.com
cname=www.google.co.th,forcesafesearch.google.com
cname=google.com.tj,forcesafesearch.google.com
cname=www.google.com.tj,forcesafesearch.google.com
cname=google.tk,forcesafesearch.google.com
cname=www.google.tk,forcesafesearch.google.com
cname=google.tl,forcesafesearch.google.com
cname=www.google.tl,forcesafesearch.google.com
cname=google.tm,forcesafesearch.google.com
cname=www.google.tm,forcesafesearch.google.com
cname=google.tn,forcesafesearch.google.com
cname=www.google.tn,forcesafesearch.google.com
cname=google.to,forcesafesearch.google.com
cname=www.google.to,forcesafesearch.google.com
cname=google.com.tr,forcesafesearch.google.com
cname=www.google.com.tr,forcesafesearch.google.com
cname=google.tt,forcesafesearch.google.com
cname=www.google.tt,forcesafesearch.google.com
cname=google.com.tw,forcesafesearch.google.com
cname=www.google.com.tw,forcesafesearch.google.com
cname=google.co.tz,forcesafesearch.google.com
cname=www.google.co.tz,forcesafesearch.google.com
cname=google.com.ua,forcesafesearch.google.com
cname=www.google.com.ua,forcesafesearch.google.com
cname=google.co.ug,forcesafesearch.google.com
cname=www.google.co.ug,forcesafesearch.google.com
cname=google.co.uk,forcesafesearch.google.com
cname=www.google.co.uk,forcesafesearch.google.com
cname=google.com.uy,forcesafesearch.google.com
cname=www.google.com.uy,forcesafesearch.google.com
cname=google.co.uz,forcesafesearch.google.com
cname=www.google.co.uz,forcesafesearch.google.com
cname=google.com.vc,forcesafesearch.google.com
cname=www.google.com.vc,forcesafesearch.google.com
cname=google.co.ve,forcesafesearch.google.com
cname=www.google.co.ve,forcesafesearch.google.com
cname=google.vg,forcesafesearch.google.com
cname=www.google.vg,forcesafesearch.google.com
cname=google.co.vi,forcesafesearch.google.com
cname=www.google.co.vi,forcesafesearch.google.com
cname=google.com.vn,forcesafesearch.google.com
cname=www.google.com.vn,forcesafesearch.google.com
cname=google.vu,forcesafesearch.google.com
cname=www.google.vu,forcesafesearch.google.com
cname=google.ws,forcesafesearch.google.com
cname=www.google.ws,forcesafesearch.google.com
cname=google.rs,forcesafesearch.google.com
cname=www.google.rs,forcesafesearch.google.com
cname=google.co.za,forcesafesearch.google.com
cname=www.google.co.za,forcesafesearch.google.com
cname=google.co.zm,forcesafesearch.google.com
cname=www.google.co.zm,forcesafesearch.google.com
cname=google.co.zw,forcesafesearch.google.com
cname=www.google.co.zw,forcesafesearch.google.com
cname=google.cat,forcesafesearch.google.com
cname=www.google.cat,forcesafesearch.google.com
# YouTube restricted
cname=youtube.com,restrict.youtube.com
cname=www.youtube.com,restrict.youtube.com
cname=m.youtube.com,restrict.youtube.com
cname=youtubei.googleapis.com,restrict.youtube.com
cname=youtube.googleapis.com,restrict.youtube.com
cname=youtube-nocookie.com,restrict.youtube.com
cname=www.youtube-nocookie.com,restrict.youtube.com
# Bing safe search
cname=bing.com,strict.bing.com
cname=www.bing.com,strict.bing.com
# DuckDuckGo safe search
cname=duckduckgo.com,safe.duckduckgo.com
cname=www.duckduckgo.com,safe.duckduckgo.com
Dnsmasq CNAMEs must reference a domain that exists in the hosts file.
As such, the following lines need to be added into /etc/hosts file:
::ffff:216.239.38.120 forcesafesearch.google.com restrict.youtube.com
216.239.38.120 forcesafesearch.google.com restrict.youtube.com
::ffff:216.239.38.119 restrictmoderate.youtube.com
216.239.38.119 restrictmoderate.youtube.com
::ffff:204.79.197.220 strict.bing.com
204.79.197.220 strict.bing.com
::ffff:20.43.161.151 safe.duckduckgo.com
20.43.161.151 safe.duckduckgo.com
nslookup -query=A www.google.com
Expected output:
www.google.com canonical name = forcesafesearch.google.com.
Name: forcesafesearch.google.com
Address: 216.239.38.120
nslookup -query=AAAA www.google.com
Expected output:
www.google.com canonical name = forcesafesearch.google.com.
forcesafesearch.google.com has AAAA address ::ffff:216.239.38.120
Requires BIND tools to be installed.
dig www.google.com ANY
Expected output:
;; ANSWER SECTION:
www.google.com. 0 IN CNAME forcesafesearch.google.com.
forcesafesearch.google.com. 0 IN A 216.239.38.120
forcesafesearch.google.com. 0 IN AAAA ::ffff:216.239.38.120