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Learn how to fix routing issues with your provider using Cloudflare WARP

Igor Amador
January 28, 2025

Routing issues with Internet providers are one of the main causes of slowdowns and difficulty accessing websites or online services. Often, these problems occur due to poor routing quality provided by the ISP (Internet Service Provider), which fails to find the most efficient path for communication between you and the server. If you have ever

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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

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