Splunk Enterprise Security

Why is notable suppression not working?

kkrises
Path Finder

Hello Splunkers,

I configured a new Notable suppression in ES for a repeated notable based on source IP. I could see the suppression entry is created under eventtypes, but the notable is still coming to Incident Review console.

I suspect issue with my Search configuration under the suppression settings.

My search config is like below :

index=network dest_port IN(389,636) src_ip=10.x.x.x 

This was to suppress notables triggering for my recent LDAP traffic search. Thank you.

Tags (1)
0 Karma
1 Solution

kkrises
Path Finder

@VatsalJagani - Thanks for the help. Querying the index notable worked in this case and have to adjust the fields as below : 

index=notable src_ip="10.x.x.x" search_name="ESCU - Detect Outbound LDAP Traffic - Rule". This worked and notables are not coming in now.

View solution in original post

0 Karma

VatsalJagani
SplunkTrust
SplunkTrust

@kkrises - Your search should look something like this:

`get_notable_index` dest_port IN(389,636) src_ip=10.x.x.x

(You need to run on notable index, not on network index)

Make sure your correlation search is generating dest_port and src_ip as a result.

 

I hope this helps!!!

kkrises
Path Finder

@VatsalJagani - Thanks for the help. Querying the index notable worked in this case and have to adjust the fields as below : 

index=notable src_ip="10.x.x.x" search_name="ESCU - Detect Outbound LDAP Traffic - Rule". This worked and notables are not coming in now.

0 Karma

VatsalJagani
SplunkTrust
SplunkTrust

@kkrises - Please share your ES suppression config so we can check what's wrong.

0 Karma

kkrises
Path Finder

This is my search string for ES suppression config.

index=network dest_port IN(389,636) src_ip=10.x.x.x 

0 Karma
Get Updates on the Splunk Community!

Preparing your Splunk Environment for OpenSSL3

The Splunk platform will transition to OpenSSL version 3 in a future release. Actions are required to prepare ...

Unleash Unified Security and Observability with Splunk Cloud Platform

     Now Available on Microsoft AzureThursday, March 27, 2025  |  11AM PST / 2PM EST | Register NowStep boldly ...

Splunk AppDynamics with Cisco Secure Application

Web applications unfortunately present a target rich environment for security vulnerabilities and attacks. ...