Article
| Description |
List of web filtering steps and their order of processing in the FortiOS firmware |
| Components |
FortiOS firmware version 4.00 MR3
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Details
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Web filters are applied in this specific order:
1 URL Filter
2 FortiGuard Web Filter (also called Category Block)
3 Content Filter (Web Content Filter)
4 Script Filter (filters for Java applets, ActiveX controls and cookies, CLI config only)
5 Antivirus scanning
The URL filter list is processed in order from top to bottom. An exempt match stops all further checking including AV scanning. An allow match exits the URL filter list and checks the other web filters.
Local ratings are checked prior to other FortiGuard Web Filtering categories. The FortiGate unit applies the rules in this order and failure to comply with a rule will automatically block a site despite what the setting for later filters might be.
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See Technical Note: Web filtering order of execution for FOS v5.2, v5.4, v5.6 |
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Technical Tip: Web filtering order of execution
