> I see, that's very helpful! So this is an edge case, since we are both using Cloudflare Workers (I
I see, that's very helpful! So this is an edge case, since we are both using Cloudflare Workers (I'm assuming they are), but they are on a different zone, they get the internal worker IPv6 address in CF-Connecting-IP, even though they don't have IPv6 set up.Yep
If I understand correctly, there is no easy fix for this on both our sides right?I thought about it again and tested it, and Psuedo IPv4 does convert the Worker's IPv6 into a Class-E IPv4, but it's not an easy fix and has a lot of drawbacks of its own. Some legacy systems require IPv4 for fraud reasons or do GeoIP lookups, both of which would fail. Having non-real IPv4s in logging/analytics systems is messy as well if trying to understand/piece together logs or build reports.
In a perfect world they would tell your traffic apart from the CF-Worker header when it's a worker, otherwise enough people using CF Workers will run into other rate limits/issues. If they were a partner you were closely tied to, you could pass the actual user's IP in a seperate header too depending on the purpose of your integration.
