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deCloudflare/subfiles/block_cloudflare_with/firewall.md

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How to Block Cloudflare

with Firewall

This page show you how to block CloudFlare websites with your firewall, preventing from connecting to them.

With nftables

_click me_ 
# make the ip definition
define cf4 = { 103.21.244.0/22, 103.22.200.0/22, 103.31.4.0/22, 104.16.0.0/13, 104.24.0.0/14, 108.162.192.0/18, 131.0.72.0/22, 141.101.64.0/18, 162.158.0.0/15, 172.64.0.0/13, 173.245.48.0/20, 188.114.96.0/20, 190.93.240.0/20, 197.234.240.0/22, 198.41.128.0/17 }
define cf6 = { 2400:cb00::/32, 2405:8100::/32, 2405:b500::/32, 2606:4700::/32, 2803:f800::/32, 2a06:98c0::/29, 2c0f:f248::/32 }

# add the following lines to 
table inet filter {
    chain output {
        ip daddr { $dns_google, $dns_tdc, $dns_telenor } counter reject with icmp type admin-prohibited comment "Droped CF quires"
        ip6 daddr { $ipv6_google_dns, $ipv6_tdc_dns } counter reject with icmpv6 type admin-prohibited comment "Droped CF quires"
        ...

With UFW

_click me_ 
ufw deny from 103.21.244.0/22
ufw deny from 103.22.200.0/22
ufw deny from 103.31.4.0/22
ufw deny from 104.16.0.0/13
ufw deny from 104.24.0.0/14
ufw deny from 108.162.192.0/18
ufw deny from 131.0.72.0/22
ufw deny from 141.101.64.0/18
ufw deny from 162.158.0.0/15
ufw deny from 172.64.0.0/13
ufw deny from 173.245.48.0/20
ufw deny from 188.114.96.0/20
ufw deny from 190.93.240.0/20
ufw deny from 197.234.240.0/22
ufw deny from 198.41.128.0/17
ufw deny from 2400:cb00::/32
ufw deny from 2405:8100::/32
ufw deny from 2405:b500::/32
ufw deny from 2606:4700::/32
ufw deny from 2803:f800::/32
ufw deny from 2a06:98c0::/29
ufw deny from 2c0f:f248::/32

With iptables

_click me_ 
iptables -A input -s 103.21.244.0/22 -j DROP
iptables -A input -s 103.22.200.0/22 -j DROP
iptables -A input -s 103.31.4.0/22 -j DROP
iptables -A input -s 104.16.0.0/13 -j DROP
iptables -A input -s 104.24.0.0/14 -j DROP
iptables -A input -s 108.162.192.0/18 -j DROP
iptables -A input -s 131.0.72.0/22 -j DROP
iptables -A input -s 141.101.64.0/18 -j DROP
iptables -A input -s 162.158.0.0/15 -j DROP
iptables -A input -s 172.64.0.0/13 -j DROP
iptables -A input -s 173.245.48.0/20 -j DROP
iptables -A input -s 188.114.96.0/20 -j DROP
iptables -A input -s 190.93.240.0/20 -j DROP
iptables -A input -s 197.234.240.0/22 -j DROP
iptables -A input -s 198.41.128.0/17 -j DROP
iptables -A input -s 2400:cb00::/32 -j DROP
iptables -A input -s 2405:8100::/32 -j DROP
iptables -A input -s 2405:b500::/32 -j DROP
iptables -A input -s 2606:4700::/32 -j DROP
iptables -A input -s 2803:f800::/32 -j DROP
iptables -A input -s 2a06:98c0::/29 -j DROP
iptables -A input -s 2c0f:f248::/32 -j DROP

With Windows Firewall

_click me_ 
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 103.21.244.0/22
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 103.22.200.0/22
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 103.31.4.0/22
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 104.16.0.0/13
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 104.24.0.0/14
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 108.162.192.0/18
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 131.0.72.0/22
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 141.101.64.0/18
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 162.158.0.0/15
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 172.64.0.0/13
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 173.245.48.0/20
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 188.114.96.0/20
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 190.93.240.0/20
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 197.234.240.0/22
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 198.41.128.0/17
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 2400:cb00::/32
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 2405:8100::/32
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 2405:b500::/32
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 2606:4700::/32
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 2803:f800::/32
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 2a06:98c0::/29
New-NetFirewallRule -DisplayName "Block CF" -Direction Outbound –LocalPort Any -Action Block -RemoteAddress 2c0f:f248::/32