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About the WebBlocker Cache
To improve performance, WebBlocker stores recent URL lookups in a local cache on your Firebox. WebBlocker stores to three levels of the URL path in the cache up. For example, if WebBlocker looks up the URL www.example.com/path1/path2/path3/path4/webpage.html, it stores only www.example.com/path1/path2/path3 in the cache.
WebBlocker currently caches URL lookup entries for 7 days. You can clear the cache if recent URL categorization changes by WebBlocker are not being applied.
In Fireware OS v11.7 and higher, one WebBlocker cache is shared by all WebBlocker actions configured for the same categorization database type (Websense or SurfControl) on the device. The maximum number of entries in the WebBlocker cache varies by device memory, and is not configurable.
| WebBlocker Cache Entries | Device Model |
|---|---|
| 8,000 | Firebox T10, T15, XTM 2 Series |
| 32,000 | Firebox T30, T35, XTM33, XTM330, XTM505, 510, 520, 530 |
| 64,000 | Firebox T50, T55, T70, Firebox M200, XTM515, 525, 535, 545, XTM810, 820, 830 |
| 256,000 | Firebox M300, M370, M400, M470, M500, M570, M670, M4600, M5600, XTM1050, XTM2050, XTM850, 860, 870, 1520, 1525, 2520 |
In Fireware OS v11.6.x or lower, the size of the cache for each WebBlocker action is a number of entries based on the Cache Size configured in the Advanced settings for each WebBlocker profile. For more information, see Define Advanced WebBlocker Options.
Clear WebBlocker Cache
If you encounter problems with WebBlocker scanning and categorization of sites, you can clear the WebBlocker cache.
To clear the WebBlocker cache, from Fireware Web UI:
- Connect to Fireware Web UI for your Firebox device.
- Select Dashboard > Subscription Services.
The Subscription Services status page appears. - In the WebBlocker section, click Clear cache.
To clear the WebBlocker cache, from Policy Manager:
- Start Firebox System Manager for your Firebox device.
- Select the Subscription Services tab.
The status of the installed subscription services appears. - Select Tools > Clear WebBlocker Cache.