DNS Firewall

A DNS firewall offers security and performance improvements for DNS servers by acting as a protective tool sitting between a user's resolver and the authoritative nameserver. It is equipped with rate-limiting capabilities to deter potential cyber attacks such as DoS and DDoS attacks. Some DNS firewalls offer the added benefit of improving performance.

A DNS (Domain Name System) firewall is a security tool that sits between the recursive resolver of the user and the nameserver of the website or service they want to reach. The firewall can be integrated with rate limiting and DDoS mitigation services to limit the number of queries hitting a DNS server. If the server should experience downtime for any reason, some DNS firewalls can serve DNS responses from cache, keeping the operator’s site or service online.

While DNS firewalls protect DNS servers only, network firewalls guard the boundaries of the network itself. By monitoring and controlling incoming and outgoing traffic based on set security rules, they filter data packets and prevent unauthorized access. Advanced features of network firewalls also block sophisticated cyber-attacks and ensure compliance with security policies.