That’s it, I get an error message whenever I try to post or comment if I’m connected to my VPN, butnot trouble if I just get disconnected. Does not fit the idea of decentralized social media I had, but overall I’m mainly curious as to the reason why it is so.
Like basically all cloud providers, Oracle publish their public-facing IP address ranges.
https://docs.oracle.com/en-us/iaas/Content/General/Concepts/addressranges.htm
Many services block these because, as you are pointing out, standing up VPN tunnel routing on a cloud instance is sort of trivial. Cloud providers publish these ranges specifically so anyone can block them easily. If lemmy.world is not blocking Oracle Cloud already, it’s only because they just haven’t come around to it.