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

Here's an nginx module that basically does this (anonymizing IP addresses in your logs): ​https://github.com/masonicboom/ipscrub. It generates a hash of the IP address as $remote_addr_ipscrub. The hash salt cycles every so often (configurable), so you can link requests without logging user IP addresses.