Webserver Config - Whitelist non-WARP Cloudflare Ranges and block all other traffic to Port 80/443

cloudflare-whitelist-webserver.sh

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# CloudFlare Ranges Only
#
# Active non-WARP ranges as at: 7th May 2021
# Latest list: for v in v4 v6;do curl "https://www.cloudflare.com/ips-$v";done
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# Allow access to http (dport 80)
iptables -A INPUT -s 173.245.48.0/20 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 103.21.244.0/22 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 103.22.200.0/22 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 103.31.4.0/22 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 141.101.64.0/18 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 108.162.192.0/18 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 190.93.240.0/20 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 188.114.96.0/20 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 197.234.240.0/22 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 198.41.128.0/17 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 162.158.0.0/15 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 172.64.0.0/13 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 131.0.72.0/22 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 104.16.0.0/13 -p tcp --dport http -j ACCEPT
iptables -A INPUT -s 104.24.0.0/14 -p tcp --dport http -j ACCEPT
ip6tables -A INPUT -s 2400:cb00::/32 -p tcp --dport http -j ACCEPT
ip6tables -A INPUT -s 2606:4700::/32 -p tcp --dport http -j ACCEPT
ip6tables -A INPUT -s 2803:f800::/32 -p tcp --dport http -j ACCEPT
ip6tables -A INPUT -s 2405:b500::/32 -p tcp --dport http -j ACCEPT
ip6tables -A INPUT -s 2405:8100::/32 -p tcp --dport http -j ACCEPT
ip6tables -A INPUT -s 2a06:98c0::/29 -p tcp --dport http -j ACCEPT
ip6tables -A INPUT -s 2c0f:f248::/32 -p tcp --dport http -j ACCEPT

# Allow access to https (dport 443)
iptables -A INPUT -s 173.245.48.0/20 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 103.21.244.0/22 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 103.22.200.0/22 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 103.31.4.0/22 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 141.101.64.0/18 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 108.162.192.0/18 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 190.93.240.0/20 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 188.114.96.0/20 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 197.234.240.0/22 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 198.41.128.0/17 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 162.158.0.0/15 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 172.64.0.0/13 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 131.0.72.0/22 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 104.16.0.0/13 -p tcp --dport https -j ACCEPT
iptables -A INPUT -s 104.24.0.0/14 -p tcp --dport https -j ACCEPT
ip6tables -A INPUT -s 2400:cb00::/32 -p tcp --dport https -j ACCEPT
ip6tables -A INPUT -s 2606:4700::/32 -p tcp --dport https -j ACCEPT
ip6tables -A INPUT -s 2803:f800::/32 -p tcp --dport https -j ACCEPT
ip6tables -A INPUT -s 2405:b500::/32 -p tcp --dport https -j ACCEPT
ip6tables -A INPUT -s 2405:8100::/32 -p tcp --dport https -j ACCEPT
ip6tables -A INPUT -s 2a06:98c0::/29 -p tcp --dport https -j ACCEPT
ip6tables -A INPUT -s 2c0f:f248::/32 -p tcp --dport https -j ACCEPT

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# IGNORE/DROP general access
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iptables -A INPUT -p tcp --dport http -j DROP
iptables -A INPUT -p tcp --dport https -j DROP