Hi There,
This is my first post so wanted to say Hello!
I am trying to create an alert for possible Deny action on our firewall from 3 different internal IPs against multiple external IP subnets not single IPs.
I found this post http://answers.splunk.com/answers/57094/join-ip-with-a-subnet.html
and created ip_lookups.csv and transforms.conf
ip_lookups.csv has following format (ip ranges changed for demo purpose)
ip,location
200.100.32.0/19,target1 255.255.224.0
100.200.30.0/19,target2 255.255.224.0
50.60.80.0/20,target3 255.255.240.0
Could you advise on how to create a search rule to reflect the target subnets based on the ip_lookups.csv, please? Maybe there is a better way of doing it.
Thanks.
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