One thing I do is I blocklist entire countries' and regional ISP' CIDR blocks. Believe it or not: straight to firewall DROP.
China, North Korea, so many african countries who's only traffic is from scammers, tiny islands in the pacific that are used for nothing but scamming...
China, North Korea, so many african countries who's only traffic is from scammers, tiny islands in the pacific that are used for nothing but scamming...
Straight to DROP.
And I do not care about the whining.