SubSilver

[soumitss]

Hello. We're a small SaaS startup running on AWS, and a few of our enterprise customers want our traffic to come from a fixed IP range they can allowlist. AWS Elastic IPs come from Amazon's pool, so if we ever move providers, those addresses won't move with us. I've heard about bringing your own IP space into the cloud, but I don't know where to get a suitable block and what the process looks like. We don't need a huge range, a single block would cover our current needs. Has anyone set up BYOIP, and where did you get the address space?

[hydrogenn]

BYOIP solved exactly that problem for us, our customers' allowlists stayed the same when we added a second cloud. We got our /24 through IPv4 Online, an IPv4 marketplace that has dedicated BYOIP guides for AWS, Google Cloud, Azure and Cloudflare. You can buy a block if you want it under your control long term, or lease one if you'd rather keep it as an operating expense. For BYOIP on AWS you'll also need the route origin authorization set up correctly, so make sure whoever handles the block supports that. Their team helped with the LOA and the coordination with the holder. Since a /24 is the minimum most clouds accept for BYOIP, don't try to save money with a smaller prefix. It took us a couple of weeks end to end, mostly waiting on validations.