@techreport{oai:ipsj.ixsq.nii.ac.jp:02009657, author = {志田,竜汰 and 高見澤,信弘 and 下川,俊彦}, issue = {12}, month = {May}, note = {CDNのリクエストナビゲーションにおいてパブリックDNSを利用する場合,クライアントのIPアドレスを正確に反映できないことがある.この課題に対処するためECS(EDNS Client Subnet)が開発されている.また,DNSのプライバシーおよびセキュリティへの関心の高まりから,DNS通信を暗号化する技術としてDoH(DNS over HTTPS)も開発されている.本稿では,パブリックDNSサービスおよびOSSフルリゾルバを対象にECSおよびDoHの対応状況をそれぞれ調査し,整理する., In recent years, there has been significant progress in the development of DNS-related technologies. When using public DNS for CDN request routing, the client's IP address may not be accurately reflected. To address this issue, ECS (EDNS Client Subnet) has been developed. Furthermore, due to growing concerns regarding DNS privacy and security, DoH (DNS over HTTPS) has also been developed as a technology to encrypt DNS communications. This paper investigates and organizes the support status of ECS and DoH for public DNS services and open-source full resolvers.}, title = {各種DNSサービスにおけるECSおよびDoHの対応状況調査}, year = {2026} }