All Apps and Add-ons

How to use wildcard in lookup-based searches and alerts?

the_wolverine
Champion

I have a lookup table that contains Domains and URLs:

www.google.com/index.htm
www.blacklist.org/
www.facebook.com

Is there someway to craft a search that will allow a wildcard on both ends? For example, if there is a string of "www.blacklist.org" in my data, it will not match "www.blacklist.org/" in the lookup table (and vice versa.)

1 Solution

gkanapathy
Splunk Employee
Splunk Employee

You can specify

 match_type = WILDCARD(domain) WILDCARD(URL)

In the transforms.conf definition of your table. This works starting in version 4.2.

View solution in original post

gkanapathy
Splunk Employee
Splunk Employee

right, you must include * in your data to indicate the location of a wildcard. You can include one or more in any place in the string, e.g., *.google.com/* is valid.

the_wolverine
Champion

The wildcard will not work without editing the lookup table to include *. For example:

www.google.com\*
www.blacklist.org\*

*Note that this is not documented.

0 Karma

gkanapathy
Splunk Employee
Splunk Employee

You can specify

 match_type = WILDCARD(domain) WILDCARD(URL)

In the transforms.conf definition of your table. This works starting in version 4.2.

the_wolverine
Champion

Is there documentation on this method? I'm curious as to how granular the wildcarding is. In the case where my data contains domain=google.com, how is it determined how far in to match?

Get Updates on the Splunk Community!

Introducing Splunk Enterprise 9.2

WATCH HERE! Watch this Tech Talk to learn about the latest features and enhancements shipped in the new Splunk ...

Adoption of RUM and APM at Splunk

    Unleash the power of Splunk Observability   Watch Now In this can't miss Tech Talk! The Splunk Growth ...

Routing logs with Splunk OTel Collector for Kubernetes

The Splunk Distribution of the OpenTelemetry (OTel) Collector is a product that provides a way to ingest ...