It is well-known that all IPv4 address b ... / 2011-07-01

2011-07-01 It is well-known that all IPv4 address b ... 8 years ago
It is well-known that all IPv4 address blocks are either allocated or reserved for very good reasons, but some IP addresses in logs still make me think 'huh?' when I see them, thinking they might be reserved when they are for sure given out now. Stuff like:
Jul  1 09:12:17 greenblatt sshd[841]: Invalid user data from 1.9.21.4
Jul  1 09:12:23 greenblatt sshd[846]: Invalid user data from 1.9.21.4
Jul  1 09:12:26 greenblatt sshd[849]: Invalid user data1 from 1.9.21.4
Jul  1 09:12:28 greenblatt sshd[851]: Invalid user data2 from 1.9.21.4
Jul  1 09:12:34 greenblatt sshd[858]: Invalid user data4 from 1.9.21.4
Jul  1 09:12:37 greenblatt sshd[862]: Invalid user data1 from 1.9.21.4
Even the ssh scanners are popping up in the 'new' IPv4 ranges. And a quite stupid one too.

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