I'm running a VPS with Ubuntu 20.04. Yesterday I received notice from my VPS provider that they got an abuse report pointing to the ip of my server. After some back-and-forth they asked the reporter for some logs and sent them to me: https://pastebin.com/FdZc5WH0
I checked all logs that could be remotely relevant, but there's nothing that has to do with these requests. I did a bunch of scans for malware/rootkits, but again nothing.
I'm actually starting to think it's a case of ip spoofing... is that a realistic scenario? Should my VPS provider be able to check if that's the case?