Specify the allowable number of DNS requests per second. The range is 0 to 1048567. The default is 0, which means that no limit is placed on the number of DNS queries that can be made per second.

Note:
Multiple "rate limit" type of operations may be executed through various configurations, however, they cannot be executed all at once. Priority is given to certain rate limit operations. The following lists the execution sequence.

1. Transaction Rate Limit (from the virtual server configuration).

2. DNS Query Rate Limit (from DNS Query Flood Protection policy).

3. ANY Query Rate Limit (from DNS Reverse Flood Protection policy).

Select the corresponding action to take when the DNS Query Rate Limit is exceeded:

• pass — Allow the traffic.

• deny — Drop the traffic, send a 400 Bad request to the client.

deny is the default option.