Splunk Search

OR operator problem

bugnet
Path Finder

Hi all,

Hey, what's wrong with the next search structure?
I'm using OR operator because the field names are different in each index.

(index=fw product=barracuda severity>=5 geo!=Greece)
OR (index=apache msg!=error )
OR (index=nac Name!="pass" Name!="manage" Name!="error")
AND src_ip!=10.0.0.0/8 src_ip!=172.16.0.0/12 src_ip!=192.168.0.0/16

Thanks

Tags (1)
0 Karma

DalJeanis
Legend

Item 1 - Computer Science 101: mixing ORs and ANDs without specifying order of operation.

Assuming it's what you mean, try:

((index=fw product=barracuda severity>=5 geo!=Greece)
OR (index=apache msg!=error )
OR (index=nac Name!="pass" Name!="manage" Name!="error"))
AND ( rc_ip!=10.0.0.0/8 AND  src_ip!=172.16.0.0/12 AND src_ip!=192.168.0.0/16)

Item 2 - IP specification

For the second phrase, you probably mean...

AND NOT
((src_ip>=10.0.0.0 AND  src_ip<=10.0.0.8 ) OR 
 (src_ip>=172.16.0.0 AND  src_ip<=172.16.0.12 ) OR 
 (src_ip>=192.168.0.0 AND  src_ip<=192.168.0.16 ) )

...except that's not right either, since it's lexicographical comparison, but you get the idea.

Myself, I'd probably break that out into a separate search or regex, as the first verb after the initial search, which might look something like this...

| regex rc_ip!="^10\.0\.0\.[0-8]|172\.16\.0\.([2-90]|1[0-2]?)|192\.168\.0\.([2-90]|1[0-6]?)$"

or

| search NOT match(rc_ip,"^10\.0\.0\.[0-8]|172\.16\.0\.([2-90]|1[0-2]?)|192\.168\.0\.([2-90]|1[0-6]?)$")

or

| where NOT match(rc_ip,"^10\.0\.0\.[0-8]|172\.16\.0\.([2-90]|1[0-2]?)|192\.168\.0\.([2-90]|1[0-6]?)$")
0 Karma

richgalloway
SplunkTrust
SplunkTrust

What makes you think something is wrong?

There is a missing '=' before "manage", but I assume that's in the question and not in the query.

---
If this reply helps you, Karma would be appreciated.
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!

Your Feedback. Our Roadmap. Visit the PX Feedback Booth at .conf26

You use Splunk every day, come and help shape what's next.  Save Your Seat: Product-Focused Sessions at ...

Agentic SOC Triage: Investigating Splunk ES Notables with MCP Server and a Local LLM

The Problem: Too Many Alerts, Too Little Context Security operations teams running Splunk Enterprise Security ...

Painting a Clearer Picture: Creating Cross-Domain Visibility with AI Canvas

Watch Now Painting a Clearer Picture: Creating Cross-Domain Visibility with AI Canvas     Do you ever feel ...