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EDNS Client Subnet (ECS) in CDN solution

EDNS Client Subnet (ECS) in CDN solution. Speaker : Pham Tran Kim Chi. 2. Agenda. - What is EDNS Client Subnet (ECS) - How is EDNS Client Subnet (ECS) - EDNS Client Subnet in Vinadata CDN - Lesson learned. 3. Recursive DNS Request. Recursive Geo IP DNS Request.

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EDNS Client Subnet (ECS) in CDN solution

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  1. EDNS Client Subnet (ECS) in CDN solution Speaker:Pham Tran Kim Chi 2

  2. Agenda - What is EDNS Client Subnet (ECS) - How is EDNS Client Subnet (ECS) - EDNS Client Subnet in Vinadata CDN - Lesson learned 3

  3. RecursiveDNSRequest

  4. RecursiveGeoIPDNSRequest

  5. RecursiveGeoIPDNSRequest

  6. RecursiveGeoIPDNSRequest

  7. EDNSClientSubnet(ECS)

  8. EDNSClientSubnet(ECS) • RFC7871-https://tools.ietf.org/html/rfc7871 • ExtensionMechanismsforDNS(EDNS0)optionthatisinactiveuseto carryinformationaboutthenetworkthatoriginatedaDNSqueryandthe networkforwhichthesubsequentresponsecanbecached. Include client subnet

  9. EDNSClientSubnet(ECS)

  10. UseofDNSserversinViệtNam • ISPDNSserver • GoogleDNSserver • OpenDNSserver • Others

  11. HowCDNworks • GEOIP • Anycast:thecontentisservedfromthelocationtherequestisreceived. • DNSbased:CDNdecideswheretobestservedcontentfrombasedonDNS resolver/clientsubnet. • Multiplecriteria • Latency • Packetloss • Throughput • CPUloadonserver • ……. • Thisiscalledmapping • Thebetterthemapping,thebettertheCDN.

  12. CDNwithAnycast

  13. CDNwithEDNSClientSubnet

  14. EDNSClientSubnetinVinadataCDN • Clientrequestswww.vng.com.vnfromGoogleDNS. • GoogleDNSasksVNGauthoritativeDNSwithclientsubnet • VNGDNSlookupclientsubnetandanswerswithanoptimal serverforGoogleDNS. • GoogleDNSgiveanswerforclient. • Clientrequestcontentfromtheoptimalserver

  15. LessonLearned • Deploymentconcerns • CustomizeDNSSoftwaretosupportEDNS. • AsktobeaddedinEDNSsupportlist. • Privacyconcerns • Networkscanning. • Securityconcerns • DNSrequestincreases. • Cachepollution.

  16. Thanks! Contact us: VINADATA JSC Helios Building, Quang Trung Software City, Dist.12 Ho Chi Minh City, Vietnam support@vinadata.vn www.vinadata.vn 17

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