Since I moved my DNS records to Cloudflare (that is: nameserver is now the one from Cloudflare), I get tons of odd connections, most notably SYN packets to eihter 443 or 22, which never respond back after the SYN-ACK. They ping me once a second in average, distributing the IPs over a /24 network.
I really don't understand why they do this, and it's mostly some shady origins, like vps game server hoster from Brazil and so on.
I'm at the point where i capture all the traffic and looks for SYN packets, check the RDAP records for them to decide if I then drop the entire subnets of that organization, whitelisting things like Google.
Digital Ocean is notoriously a source of bad traffic, they just don't care at all.
I really don't understand why they do this, and it's mostly some shady origins, like vps game server hoster from Brazil and so on.
I'm at the point where i capture all the traffic and looks for SYN packets, check the RDAP records for them to decide if I then drop the entire subnets of that organization, whitelisting things like Google.
Digital Ocean is notoriously a source of bad traffic, they just don't care at all.