Anonymize IP logging in nginx?

Question

To respect the privacy of my users I\'m trying to anonymize their IP addresses in nginx log files.

One way to do this would be defining a custom log format, like so:<

Answer 1

The accepted answer seems a bit bloated. Since nginx version 1.11 it's possible to do it this way:

map $remote_addr $remote_addr_anon {
    ~(?P\d+\.\d+\.\d+)\.    $ip.0;
    ~(?P[^:]+:[^:]+):       $ip::;
    default                     0.0.0.0;
}