DoT/DoH from a security vendor perspective Matthew Stith (Spamhaus Technology) 

DoH Concerns from a Security Perspective • Potential centralization of DNS traffic • Potential massive decentralization of DNS traffic by application • Inability for companies that are responsible for user security to see potential compromise • Managing network issues and troubleshooting DNS issues • Losing the ability to filter content that is objectionable, malicious or dangerous at the DNS level 

DoH Concerns from a Security Perspective • Tools used by security companies (Passive DNS) will be impacted • Malicious DoH resolvers • Authoritarian regimes taking even more intrusive steps to monitor user activity • Network Layers being flattened • Local DNS will no longer work in the application using DoH 

Questions? 

Thanks for listening!