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SAINTCON 2023 - Jesse Harris - DNS as a Security Tool
Discover how DNS can be used as a powerful security tool to protect against email spoofing, phishing, and other threats, including DNSSEC, CAA records, DMARC, SPF, and DNS filtering.
- DNS is an essential security tool that can be used to protect against various threats, including email spoofing and phishing.
- DNSSEC is a method of securing DNS records by adding cryptographic signatures, which ensures the authenticity and integrity of DNS data.
- CAA records can be used to specify which certificate authorities are allowed to issue certificates for a particular domain.
- DMARC is a policy that helps prevent email spoofing by authenticating the domain of an email sender.
- SPF is a method of validating the authenticity of email senders by checking the IP address of the sender’s mail server.
- DNS filtering can be used to block malicious domains and IP addresses from being accessed.
- Let’s Encrypt is a free certificate authority that provides free SSL/TLS certificates to domain owners.
- DNS records can be used to control who can access a domain and to block certain types of traffic.
- DNS filtering can be used to block ads and other unwanted content from being accessed.
- DNS can be used to filter out malicious domains and IP addresses from being accessed.
- DNS can be used to authenticate the domain of an email sender and prevent email spoofing.
- DNSSEC can be used to secure DNS records and prevent them from being tampered with.
- CAA records can be used to specify which certificate authorities are allowed to issue certificates for a particular domain.
- DNS filtering can be used to block certain types of traffic and prevent unauthorized access to a domain.