2.5 DNSDIST

vENUM MP uses DNSDIST for load balancing all incoming queries. DNSDIST is highly DNS-, DoS, and abuse aware loadbalancer, aiming to route traffic to the best server, delivering best performance to users while avoiding or blocking abusive traffic. vENUM employs DNDIST as a critical component to ensure efficient load balancing for DNS queries.

• High Availability: If a backend server is unavailable, DNDIST automatically skips it in the sequence, ensuring uninterrupted service.
• Efficiency: By evenly distributing queries, DNDIST minimizes the risk of overloading any single server, resulting in faster query responses and better user experience.
• Health Checks: DNDIST continuously monitors backend servers to identify and exclude any that are unresponsive.
• Scalability: DNDIST fluently handles increasing DNS query loads by adding more backend servers to the pool.

By leveraging DNDISTs aforementioned capabilities, vENUM ensures robust DNS load balancing, delivering optimal performance, and reliability to users. DNSDIST balances all DNS queries to all the vENUM servers in the same server group and also allows for congestion control. These are explained in the following sections.