Here is some more relevant information regarding Wild fire https://live.paloaltonetworks.com/docs/DOC-5266 Symptom When a wildfire-upload-skip message is seen in the data filtering logs, all the files do not appear on the WildFire portal. Cause In PAN-OS 5.0, when a file is received by the firewall, a hash is created and checked with the WildFire server. If the hash matches on the WildFire server, the action wildfire-upload-skip is taken. At this point, one of the following occurs based on the categorization of the file: If the file had been previously determined to be malicious, then the report, previously generated when the verdict was made, appears on the WildFire server. If the file was not malicious and was determined to be benign, then the report is not shown on the WildFire server. Thanks
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