I got a list of network masks used in our company and would like to map the ip addresses in my logs to these netmasks. All the networks are class C and the list ist in CSV format.
Is there a description on how to get this mapping done?
Do I need to extract a new field matching only the first three parts of the IP? Then adapting the CSV to contain only "xxx.xxx.xxx,description".
Would this be the best way to go?
Simply use your CSV directly as a lookup file and specify in your transforms.conf directive that Splunk should do CIDR matches on the first field. More information here: http://splunk-base.splunk.com/answers/5916/using-cidr-in-a-lookup-table
And here: http://docs.splunk.com/Documentation/Splunk/latest/Admin/Transformsconf