@jfmph_ When you pass an IP to dnslookup, Splunk asks the OS resolver for the PTR record of that IP. If a PTR record exists in DNS, you’ll get back the hostname/FQDN. If no PTR record exists, the field will be blank. When you perform a reverse DNS lookup, you’ll receive whatever PTR record is defined in your DNS for that IP address. If the PTR record is present and correctly configured, the lookup will return the expected hostname. Regards, Prewin If this answer helped you, please consider marking it as the solution or giving a Karma. Thanks!
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