this post was submitted on 20 Mar 2025
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I too read Drew DeVault's article the other day and I'm still wondering how the hell these companies have access to "tens of thousands" of unique IP addresses. Seriously, how the hell do they have access to so many IP addresses that SysAdmins are resorting to banning entire countries to make it stop?
I'm familiar with f2b. I even have several clients licensed with the commercial version but it doesn't fit this use case as there's no logon failure for it to work with.
I have systems setup with geo-blocking but it's of limited use due to the prevalence of VPNs.
This isn't a solution either because a WAF has no way to know what traffic is bad so it doesn't know what to block.