We are currently testing out Splunk to monitor our Cisco ASA 5510 firewall, but running into a problem. Because we are using a DHCP server on all client PCs, just having IP address in the event data is no good. I need the source IP address in the event data for each entry to be converted to the clients name and sorted with the database.
Is this possible and how?
Have you looked into Splunk Reverse DNS for fields? It replaces IP addresses in specified fields with the results of a DNS lookup. It should work with DHCP
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For months I had no idea how to 'discover' the IP address of the other end of a link (without asking someone who knows), and it drove me batty.
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