When did lemmy.world start clamping down on VPNs?

https://lemmy.world/post/43898917

When did lemmy.world start clamping down on VPNs? - Lemmy.World

Today, for the first time on Lemmy, I received a message about posting being forbidden from VPNs.

That’s not usually how it works. Sites ban and block IP addresses. Someone going through your VPN caused such issues that Lemmy.world blocked the IP. The VPN is being used to abuse people. That’s not a VPN’s fault, but the nature of the beast.

I personally don’t think a VPN is even necessary with the Fediverse, as none of us are going to collect IP’s. But try changing the VPN’s location or trying a different VPN.

Not sure about that last paragraph. How would an instance block an IP withouth storing IPs?

How would an instance block an IP without storing IPs?

They could be blocking entire IP ranges. So they wouldn’t have to store specific IPs. I’m not in the hosting industry but I would imagine there are groups tracking the CIDR blocks (IP ranges) that VPN providers use for their exit nodes. If such a list exists, a host could simply subscribe to accept whatever updates occur to those lists and implement the block for them.