Hello Mel, You may follow this discussion thread: Re: URL Filtering Category is "Unknown" By default, any newly registered domain will be "unknown" in PAN-DB until Palo Alto Networks reviews, either manually by the analysis/threat team, or through the crawler (triggered on some event). Once an "unknown" is seen on the Palo Alto Networks servers, it will be put into a prioritized queue for crawling and classification. Once Palo Alto Networks determines a category, it will be included in the next database refresh. Enable global setting to force dynamic-url lookup: # set deviceconfig setting url dynamic-url yes # commit You may clear the cache with CLI command: > clear url-cache all Few related discussions/doc for your reference: Re: URL resolving to unknown while know on brightcloud Many 'Unknown' Entries In URL Log User Web Traffic Categorized as Unknown Hope this helps. Thanks
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