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→Blocking using hosts file
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== Methods == There are different methods for blocking google.. === Browser extensions ======= Using ublock ====Install the extension ublock origin [https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/] on your firefox installation. 1. Open ublock dashboard 2. Select the tab "My filters" 3. Past this list[https://gist.github.com/nipos/e572a37c1939bf5bcdf04a38ef229152] hosts to your ublock configuration. === Blocking using hosts file ===You can edit your hosts file. An axample of [[hosts]] file, it contains a whole list of all google, twitter, facebook, etc... domainsDoing this all listed domains will be redirected to that ip address. You can easily change the ip addresses whit your local host 127.0.0.1 or whatever you want :) === Blocking using a firewall === ==== Using OpenWRT / iptables ====This is a script that would run on OpenWRT: With some modification (maybe) to the output processing of the ''nslookup'' command, or use ''host'', it'll work on your local *NIX box You would do, for example: * root@OpenWrt:~# ./iptsetup.sh google.com gl 1* That would create for you add_gl.sh and del_gl.sh in the current working directory.* Then run ./add_gl.sh and all packets destined to google will be marked with MARK 1* So add a rule something like: <pre>iptables -N rejectiptables -A OUTPUT -m mark --mark 1 -j rejectiptables -A reject -p tcp -j REJECT --reject-with tcp-resetiptables -A reject -j REJECT --reject-with icmp-port-unreachable </pre> * You also need to feed traffic into the m_ip chain in your mangle table.* How you might wish to do this is left as an exercise to the reader ;-) (don't just blindly "follow", Read up!!) But for example, you could do something as simple as this, seeing as how you are running on a router: <pre> iptables -t mangle -A list PREROUTING -s lan-ip.of tools.user-that-not-want.google -j m_ip </pre> <pre>#!/bin/sh### iptsetup.sh domain.com name fwmark##IP=`nslookup $1 | grep -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1, please check their descriptions inside3}' | tail -n1 | cut -d\ -f3`AS=`wget -q -O - http://ipinfo.io/$IP/org | cut -f1 -d \ | sed -e 's/AS//'` echo '#!/bin/sh' > add_$2.shchmod 750 add_$2.shecho '#!/bin/sh' > del_$2.shchmod 750 del_$2.shNETWORKS=`wget -O - http://stat.ripe.net/data/announced-prefixes/data.yaml?resource=$AS|grep prefix\:|grep -v \:\:|awk '{print $3}'` echo "iptables -t mangle -N $2_ip" >> add_$2.shecho "iptables -t mangle -N $2_do" >> add_$2.shecho "iptables -t mangle -A m_ip -j $2_ip" >> add_$2.shecho "iptables -t mangle -D m_ip -j $2_ip" >> del_$2.sh for i in $NETWORKS; do echo "iptables -t mangle -A $2_ip -d $i -j $2_do" >> add_$2.sh; donefor i in $NETWORKS; do echo "iptables -t mangle -D $2_ip -d $i -j $2_do" >> del_$2.sh; done echo "iptables -t mangle -A $2_do -j MARK --set-mark $3" >> add_$2.shecho "iptables -t mangle -D $2_do -j MARK --set-mark $3" >> del_$2.sh echo "iptables -t mangle -X $2_ip" >> del_$2.shecho "iptables -t mangle -X $2_do" >> del_$2.sh </pre>
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