Technical Tip: How to increase http-parse-max-size value on FortiWeb

Maximum size for HTTP parser to check headers and parameters or the 'http-parse-max-size' parameter can only be modified via CLI on FortiWeb and is not available in the GUI. This setting is applied per policy rather than globally. To adjust this value, follow these steps:

1. Log in to the FortiWeb console or via SSH.
2. Use the following CLI commands to configure the setting:

config server-policy policy
    edit <Server-policy-name>
        set http-parse-max-size 524288
  end

Note:

The default value for 'http-parse-max-size' is 524288 (512 KB), with a valid range of 524288–2097152. When set to 524288 (512 KB), 256 KB is allocated for requests, and the remaining 256 KB is reserved for responses.

Related document:
HTTP Server Policy Policy