Scenario: A Citrix Engineer needs to ensure that the flow of traffic to a web application does NOT overwhelm the server. After thorough testing, the engineer determines that the application can handle a maximum of 3,000 requests per minute. The engineer builds a limit identifier, rl_maxrequests, to enforce this limitation.
Which advanced expression can the engineer write in the Responder policy to invoke rate limiting?
To invoke rate limiting, the Citrix Engineer should use the `SYS.CHECK_LIMIT(“rl_maxrequests”)` expression in the Responder policy. This ensures that the custom limit identifier 'rl_maxrequests', which is configured to limit the application to 3,000 requests per minute, is enforced. The other options are either checking for specific conditions or comparisons that are not relevant to enforcing the rate limit directly.
SYS.CHECK_LIMIT(“rl_maxrequests”)
sys.check_limit(<limit_identifier>)
https://docs.netscaler.com/en-us/citrix-adc/current-release/appexpert/rate-limiting/configuring-binding-traffic-rate-policy1.html