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Using Response Rate Limiting (RRL), the controlling of DNS Forward proxy can control excessive UDP responses that are the same or similar can be accomplished through configuration of the DNS Forwarding Proxy. Implementing . The implementation of RRL in Infoblox Threat Defense is enabled by default, cannot be disabled and cannot be configured by users. The RRL ensures that not all of the DNS Forwarding Proxy’s resources are not exhausted by a single DNS user. Using RRL, the network infrastructure can be is protected against DDoS attacks, resulting in no impact or degradation of services.