Question

I am writing a Script in Python and I need to search and Replace IPs in a File….

Any ideas how it can be implemented?

Answer 1

Regex!

re.sub('[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}','CENSORED_IP',data)

Worthy of note, this also matches things like 999.999.999.999. If that’s a problem, you will have to get a regex that is a little more complicated. Furthermore, this only works on IPv4 Addresses.

On only valid IP’s:

re.sub('(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)','CENSORED_IP',data)

Source: Regex Source