Question

Can you write down a general regular expression for extracting the IP address from logs?

Answer 1

There are multiple ways in which we can extract the IP address from logs. Below are a few examples:

By using a regular expression:

rex field=_raw  "(?<ip_address>\d+\.\d+\.\d+\.\d+)"

OR

rex field=_raw  "(?<ip_address>([0-9]{1,3}[\.]){3}[0-9]{1,3})"