Splunk Search

IP Range Lookup

splunkrocks2014
Communicator

I have IP lookup table (ips.csv) mixed with different types of formats such as

ip
-----------------------
192.168.1.0/24
192.168.2.0-192.168.2.36
192.168.3.3

From transforms.conf, I defined a ip_lookup object as the following:

 [ip_lookup]
 filename = ips.csv
 match_type = CIDR(ip)

Does my lookup work with single IP or a IP range like this, 192.168.2.0-192.168.2.36?

Thanks.

Tags (1)
1 Solution

starcher
Influencer

cidr lookups have to be in /mask format. if the line is a single IP it should be 192.168.3.3/32

View solution in original post

adonio
Ultra Champion

can you elaborate? what is the problem you are trying to solve?

0 Karma

splunkrocks2014
Communicator

I got the answer from starcher. Thank you for asking.

0 Karma

starcher
Influencer

cidr lookups have to be in /mask format. if the line is a single IP it should be 192.168.3.3/32

splunkrocks2014
Communicator

Thank you starcher. This is what I am looking for.

0 Karma
Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

[Puzzles] Solve, Learn, Repeat: Matching cron expressions

This puzzle (first published here) is based on matching timestamps to cron expressions.All the timestamps ...

Design, Compete, Win: Submit Your Best Splunk Dashboards for a .conf26 Pass

Hello Splunkers,  We’re excited to kick off a Splunk Dashboard contest! We know that dashboards are a primary ...

May 2026 Splunk Expert Sessions: Security & Observability

Level Up Your Operations: May 2026 Splunk Expert Sessions Whether you are refining your security posture or ...