In any textual representation we need to find:

IP address (v4, v6, CIDR - RFC 760/2460 + other unconventional formats with dashes in filenames, pod names or URIs with different protocols (unix:// & http(s)://)
There are existing tools that do that, so evaluate whether we can leverage that - otherwise there are a bunch of regular expressions in sos-cleaner and troubleshoot.sh:

https://github.com/soscleaner/soscleaner/blob/master/soscleaner/soscleaner.py

https://troubleshoot.sh/docs/redact/ip-addresses/

https://sos.readthedocs.io/en/master/parsers.html

AC:

well tested logic to detect all the above shapes and forms of IP addresses in a string