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NIST SP 800-81r3 Compliance
NIST SP 800-81r3 sets the standard for DNS security in federal agencies. See exactly which monitoring requirements DNS Spy covers — and where you'll need complementary tooling.
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NIST Special Publication 800-81 Revision 3 (March 2026) provides updated guidance on securing DNS infrastructure for federal information systems. The publication outlines requirements for DNS monitoring, threat detection, and configuration management that apply to all federal agencies and contractors handling government data. Organizations outside the federal space increasingly reference SP 800-81r3 as a DNS security benchmark.
"Threat actors extensively leverage look-alike or typosquat domains to impersonate target organizations. By leveraging the positive reputation of legitimate organizations, threat actors vastly increase the success rate of their phishing and malware campaigns."
Phishing Sentinel continuously scans for look-alike and typosquat domains targeting your brand, alerting you to potential phishing infrastructure — including those using homoglyphic character substitution — before attacks reach your users.
Learn more about Phishing Sentinel"When a DNS CNAME record links two domain names together, there is a risk that the parent domain of the canonical name that the record points to does not remain registered by the target organization. As a result, threat actors can register the delegating parent zone and cause DNS resolutions to resolve to the threat actor's controlled domain."
DNS Spy's Security Center identifies CNAME records whose targets no longer resolve, flagging subdomain takeover vulnerabilities before attackers can exploit them.
Learn more about Security Center"A lame delegation can result in domain hijacking. When a subdomain is delegated to a DNS-hosting provider and the contract for providing DNS services for that domain lapses, threat actors could hijack resolution for that subdomain by contracting with the provider that controls the servers named in the delegation."
DNS Spy's Security Center detects lame delegations within your domain's authoritative name space, alerting you to delegations that could be exploited for domain hijacking.
Learn more about Security Center"Threat actors can exploit misconfiguration and lapsed domain/DNS name server registration to seriously compromise DNS integrity. Organizations should implement robust processes to continuously monitor and validate the integrity of their public domains and to raise the visibility of attempts to impersonate domains owned by the organization."
DNS Spy's DNS Record Monitoring and WHOIS Monitoring continuously track your public domain configurations, record changes across all nameservers, and domain registration integrity — exactly the robust monitoring processes this section recommends.
Learn more about DNS Record Monitoring| NIST Section | Requirement | DNS Spy Feature |
|---|---|---|
| 3.6.3 | Look-alike domain exploitation detection | Phishing Sentinel |
| 3.6.1 | Dangling CNAME exploitation detection | Security Center |
| 3.6.2 | Lame delegation exploitation detection | Security Center |
| 2.2.3 | DNS hygiene — continuous monitoring and validation of public domain integrity | DNS Record Monitoring |
| 2.2.3 | DNS hygiene — monitoring for domain impersonation attempts | WHOIS Monitoring |
DNS Spy focuses on monitoring and detection. The following SP 800-81r3 areas require dedicated solutions:
SP 800-81r3 applies directly to your agency. DNS Spy helps you meet the DNS monitoring requirements with automated detection of record changes, look-alike domains, and configuration issues across your domain portfolio.
Start Free TrialYour federal clients will ask about SP 800-81r3 compliance. DNS Spy gives you a monitoring layer that maps directly to NIST requirements, making it easier to demonstrate coverage during audits and contract renewals.
Start Free TrialEvaluating DNS security tooling against SP 800-81r3? DNS Spy provides transparent coverage mapping so you can quickly assess which requirements are addressed and where complementary tooling is needed.
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DNS Spy is not a compliance certification tool, but it directly addresses four key DNS monitoring requirements outlined in NIST SP 800-81r3. It provides look-alike domain detection, continuous DNS record change monitoring, WHOIS and registrar change tracking, and DNS configuration auditing including dangling record detection.
NIST SP 800-81r3 recommends that organizations implement continuous DNS monitoring practices including detecting look-alike domains used for phishing, monitoring DNS record changes across authoritative nameservers, tracking WHOIS and registrar changes for owned domains, and auditing DNS configurations for dangling CNAMEs and lame delegations.
Yes. DNS Spy covers several areas of SP 800-81r3: Phishing Sentinel detects look-alike domains (Section 3.6.3, Look-Alike Domain Exploitation), Security Center identifies dangling CNAMEs and lame delegations (Sections 3.6.1 and 3.6.2), DNS Record Monitoring supports the DNS hygiene practices recommended in Section 2.2.3, and WHOIS Monitoring helps maintain domain registration integrity. Additional tooling is needed for areas like DNSSEC, encrypted DNS, and protective DNS.
No single tool covers every SP 800-81r3 recommendation. DNS Spy addresses the monitoring and detection requirements, but organizations also need solutions for protective DNS filtering, encrypted DNS deployment (DoT, DoH, DoQ), DNSSEC key management, DNS infrastructure architecture, and DNS logging with SIEM integration. DNS Spy is transparent about what it covers and what requires complementary tooling.
Related reading: CAA Record Checking Is Now Mandatory for Certificate Authorities
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