Getting Data In

Event filtering is not working as expected... what's missing?

cmlombardo
Path Finder

I am pulling my hair off on this one.
I am trying to remove from the windows firewall logs all the IPv6 link local and IPv4 multicast events.
Here are my props and transforms files:

PROPS.CONF

[Windows_Firewall]

TRANSFORMS-7_FilterUselessAddresses = filter_lladdresses, filter_multicast
TRANSFORMS-8_AssignToIndex = windowsfirewall_setindex_default

TRANSFORMS.CONF
[filter_lladdresses]
REGEX = (?i)^(?!.*fe80::).*$
FORMAT = sourcetype::Windows_Firewall
DEST_KEY = MetaData:Sourcetype

[filter_multicast]
REGEX = (?i)^(?!.*224\.0\.0\.).*$
FORMAT = sourcetype::Windows_Firewall
DEST_KEY = MetaData:Sourcetype


[windowsfirewall_setindex_default]
SOURCE_KEY = MetaData:Sourcetype
REGEX = (?i)^sourcetype::Windows_Firewall
DEST_KEY = _MetaData:Index
FORMAT = wf_i

For some reasons which I can't figure out, these events are NOT filtered out.

I need another set of eyes to see what is wrong...

Thank you!

Claudio

Tags (2)
0 Karma
1 Solution

cmlombardo
Path Finder

I solved my problem.

I changed transforms.conf this way:

[filter_lladdresses]
REGEX = (?i)^(?=.*fe80::).*$
DEST_KEY = queue
FORMAT = nullQueue

#Removes multicast traffic (224.0.0) stuff.
[filter_multicast]
REGEX = (?i)^(?=.*224\.0\.0\.).*$
DEST_KEY = queue
FORMAT = nullQueue

Now it works just fine.

View solution in original post

0 Karma

cmlombardo
Path Finder

I solved my problem.

I changed transforms.conf this way:

[filter_lladdresses]
REGEX = (?i)^(?=.*fe80::).*$
DEST_KEY = queue
FORMAT = nullQueue

#Removes multicast traffic (224.0.0) stuff.
[filter_multicast]
REGEX = (?i)^(?=.*224\.0\.0\.).*$
DEST_KEY = queue
FORMAT = nullQueue

Now it works just fine.

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!

Quick connection discovery mode for forwarders

When a Splunk forwarder loses connectivity to its indexers, it does not always reconnect immediately. In many ...

Build and Launch AI Agents from Your Splunk Workflows

  Register We’ve all been there: juggling alerts, runbooks, and endless manual searches. What if you could ...

Splunk Cloud Application Management in Terraform

Register   On Tuesday, August 4 at 11AM PDT / 2PM EDT, we’re diving into how you can bring Infrastructure as ...