I’ve found a page with IPs you will be connecting from, but no information how often this changes. Is it necessary to automate querying it every now and then, or is it enough to update manually every few months? Do you announce changes to it somewhere?
This is probably the list you found: https://www.cloudflare.com/ips/
I’ve never seen them announce changes. Updating every few months would probably work for the most part…unless they make a change right after you update.
If it’s a major concern, I’d automate your update process and have it execute more frequently.
I am not sure the list is current.
I saw CF IPs from outside those ranges in my logs.
188.8.131.52, 184.108.40.206, 220.127.116.11
18.104.22.168/13 has been in the list for a long time. It’s 22.214.171.124 - 126.96.36.199.
Thanks for the clarification.