DNSbaserte

DNSbaserte is a Norwegian-language term used to describe technologies, services, or strategies that rely on the Domain Name System (DNS) to achieve their function. The term is a descriptive label rather than a formal standard, and it is commonly used in networking and cybersecurity discussions to distinguish DNS-centric approaches from those that rely on other protocols.

Typical DNSbaserte applications include content filtering and parental controls, where a resolver blocks access to selected domains or returns alternative responses; domain reputation and threat intelligence, where queries to known malicious domains trigger blocking or alerts; and traffic steering through DNS responses that direct clients to different servers for load balancing or failover. DNS tunneling also illustrates the potential for DNS-based data exfiltration and covert channels.

Operation typically involves a recursive resolver or DNS gateway that applies defined policies, consults threat feeds, and then returns DNS answers that influence client behavior. Responses may include NXDOMAIN or NODATA to block a domain, CNAME-based redirection, or specialized records used by downstream services. Privacy and logging considerations are important, as DNS patterns can reveal user activity and travel across organizational boundaries.

Advantages of DNSbaserte approaches include broad coverage of devices and applications that use DNS, low per-query overhead, and centralized policy enforcement. Limitations include the risk of bypass via alternative resolvers or encrypted channels, potential privacy concerns from query logging, and the possibility of misclassification. Effective deployment often combines DNS-based controls with other security layers and clear governance.

Related topics include DNSSEC, DNS-over-HTTPS and DNS-over-TLS, and policies for DNS-based content filtering.