How to Website blocking in Centos 7 | Squid |

Published: 15 January 2023
on channel: Nagarajan Explorer

Link: Squid dhcp Server Configure Website blocked Iptables in Ubuntu Server
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How to block facebook youtube and instagram in Squid transparent Proxy Server in Centos 7 | How to restriction youtube facebook iptables in Linux | How to blocking facebook youtube in Ubuntu

Port forwarding :
iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 3128
iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j REDIRECT --to-port 3128
iptables -t nat -A POSTROUTING -o eth2 -j MASQUERADE

Website blocking in iptables ;
iptables -I FORWARD -p tcp -m tcp --dport 443 -m iprange --src-range 172.16.0.1-172.16.0.10 -m string --string "www.facebook.com" --algo bm --to 65535 -j DROP

Particular Website not opening :
iptables -I FORWARD -p tcp --dport 443 -s 172.16.0.120 -m string --string 'www.youtube.com' --algo bm --to 65535 -j DROP

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