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How to use regex to look for hosts from /24, /25, and /26 subnets?

rholm01
Explorer

I have a dozen /24 subnets that I am looking to find any IP addresses on that subnet in my search as well as a addresses from several /25 and /26 subnets. Thanks, in advance.

0 Karma

woodcock
Esteemed Legend

Standard searches and tstats ... where both support native CIDR equalities (but NOT inequalities) and where has cidrmatch() function.

0 Karma

dmarling
Builder

I believe you may make more hay by using a where clause and a cidrmatch function: https://docs.splunk.com/Documentation/Splunk/7.3.2/SearchReference/ConditionalFunctions#cidrmatch.28...
Example: | where cidrmatch("123.132.32.0/25", ip)

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