IP addresses, on their own, can only give a tiny glimpse into their association, where they are from, or what they are for. You might be able to determine if an IP is from a private range, what asset it belongs to, or if it is from a well-known server, but in many cases, you might not know much about the IPs in question.
In this recipe, you will learn how to leverage Splunk's workflow functionality to search an IP address in your events against the ARIN (American Registry for Internet Numbers) database to look up more useful information about the IP in question, such as who the IP address is assigned to.
To step through this recipe, you will need a running Splunk Enterprise server, with the sample data loaded from Chapter 1, Play Time – Getting Data In. You should be familiar with navigating the Splunk user interface.
