Splunk Search

eval expression usage

bbear
Explorer

Greetings.

I am trying to use an expression in the search string that will not display certain IP addresses. I have used the LIKE "172.%" to good use to display all IP addresses beginning with 172.x.

However, I would like to exclude the 172.x, 10.x and 192.168.X from being displayed.

I have been using a search string like the following:

source="/logtest" drop |stats count by srchost |where (srchost LIKE "10.%")| where count > 2 | sort by -count | head 10

Notice in the string above the (srchost LIKE"10.%")

Is there a way of creating something that will exclude 10.%? Something on the order of NOT LIKE?

If anyone has the answer I would appreciate it. Thanks in Advance.

bbear

Tags (1)

gkanapathy
Splunk Employee
Splunk Employee

I would recommend use of the cidrmatch() eval function: http://www.splunk.com/base/Documentation/latest/SearchReference/CommonEvalFunctions

but in your case, what I'd really recommend is doing your search as:

source="/logtest" drop srchost!=10.0.0.0/24 | stats count by srchost | where count > 2 | sort by -count | head 10

Lowell
Super Champion

Have you tried:

... | where NOT (srchost LIKE "10.%") | ...

Lowell
Super Champion

No problem. I've been there too. 😉 Sometimes you just need another set of eyes.

0 Karma

bbear
Explorer

OK,
I hang my head in shame....

I thought I had tried it, but when I followed your recommendation it worked.

I guess I got confused with all the things I tried.

Than you for the help.

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!

Build the Future of Agentic AI: Join the Splunk Agentic Ops Hackathon

AI is changing how teams investigate incidents, detect threats, automate workflows, and build intelligent ...

[Puzzles] Solve, Learn, Repeat: Character substitutions with Regular Expressions

This challenge was first posted on Slack #puzzles channelFor BORE at .conf23, we had a puzzle question which ...

Splunk Community Badges!

  Hey everyone! Ready to earn some serious bragging rights in the community? Along with our existing badges ...