For security reasons we are restricted access to our site by using iptables.
After switching to Cloudflare service we had try to add 2 Ipv4 Cloudflare points to our site (we found IP by nslookup) – but w/o success. Site becomes unreachable. After disabling iptables all work fine. We don’t want add all IP ranges as described IP Ranges.
How can we find which IP should be added to whitelist?