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Joint NSA and CISA Guidance on Strengthening Cyber Defense Through Protective DNS


The National Security Agency (NSA) and CISA have released a Joint Cybersecurity Information (CSI) sheet with guidance on selecting a protective Domain Name System (PDNS) service as a key defense against malicious cyber activity. Protective DNS can greatly reduce the effectiveness of ransomware, phishing, botnet, and malware campaigns by blocking known-malicious domains. Additionally organizations can use DNS query logs for incident response and threat hunting activities.


CISA encourages users and administrators to consider the benefits of using a protective DNS service and review NSA and CISA’s CSI sheet on Selecting a Protective DNS Service for more information.


https://us-cert.cisa.gov/ncas/current-activity/2021/03/04/joint-nsa-and-cisa-guidance-strengthening-cyber-defense-through


https://media.defense.gov/2021/Mar/03/2002593055/-1/-1/0/CSI_PROTECTIVE%20DNS_UOO117652-21.PDF




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