I'm wondering what the range (or ranges) of IP addresses for the servers that fetch the feeds are. The reason is, I'm creating some private feeds and want to ban the Internet from them excluding your servers :) Thank you!
This just came up with another service that wanted to whitelist NewsBlur. I can't give you a good CIDR, other than one that includes all of Digital Ocean, NewsBlur's hosting provider. I am constantly moving servers and changing IPs, unfortunately.