Barracuda Web Application Firewall, all firmware versions
Note: Caching stores commonly used information in local memory for quick retrieval rather than sending frequently used requests to and from the server each time. When a request matching the policy is given to a service, the request is cached. When the same request comes to the service again the reply is fetched from cache and given to the user. If cache-status is 'off' then the request is sent to the server to get a reply. By default we only cache positive responses such as '200 OK'. But if one wants the WAF to cache negative responses, then make the following configuration changes.
This option is available under Web Sites > Traffic management > Caching > Edit Service > Cache Negative Responses.
If Cache Negative Responses is on, HTTP negative responses such as 204, 305, 404, 405, 414, 501, 502 and 504 are cached.
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