CloudFlare IP Whitelist

• Lucas
• June 19, 2018

Some applications, such as ConfigServer Security & Firewall (csf), need to know which IPs are used by CloudFlare, thus preventing our server from blocking CloudFlare. Below are two lists containing CloudFlare’s IPv4 and IPv6 ranges. IPv4 list: 103.21.244.0/22 103.22.200.0/22 103.31.4.0/22 104.16.0.0/12 108.162.192.0/18 131.0.72.0/22 141.101.64.0/18 162.158.0.0/15 172.64.0.0/13 173.245.48.0/20 188.114.96.0/20 190.93.240.0/20 197.234.240.0/22 198.41.128.0/17 https://www.cloudflare.com/ips-v4 IPv6 list: 2400:cb00::/32