- DNS stand for Domain Name System. It like phone book of internet. DNS translates domain names to IP addresses so browsers can load Internet resources.
2) What is EDNS
- EDNS stand for Extension mechanisms for DNS. Its a specification for expanding the size of several parameters of the Domain Name System (DNS) protocol.
3) What is DNS Flag Day 2019?
- What actually happen after 1st Feb 2019 is called “DNS Flag Day”, major open source/public DNS Resolver (eg: CloudfareDNS – 220.127.116.11, Quad9 -18.104.22.168, GoogleDNS – 22.214.171.124/126.96.36.199 etc) will release updates that will stop accommodating non-standard responses. These public DNS resolver have agreed to coordinate removing accommodations for non-compliant DNS implementations from their software or services.
4) Who will impacted with DNS Flag Day 2019
- This change will affect authoritative dns servers/NS which do not comply either with the original DNS standard or the EDNS standards/protocols. Sites /domain hosted on incompatible authoritative dns servers/NS may become unreachable/slow access through updated public DNS resolver.
5) What are the symptoms for those who affected?
- Sites /domain hosted on incompatible authoritative dns servers/NS may become unreachable/slow access through updated public DNS resolver.
6) What TM can do as an ISP
- Domain Owner: TM can advise domain owner to check with their registrar or where domain owner hosted his domain
- Internet User: By using TM DNS server, it will solve the issue.
1) TM IPV4 DNS:
2) TM IPV6 DNS:
7) Are the user who use VPN will be affected?
- If the VPN pointing to major open source/public DNS Resolver, it will effected when accessing public authoritative dns servers/NS which do not comply the EDNS standards/protocols
9) I’m a domain owner, my domain is having an issue what should I do?
- Same as no 6, advice cust to contact with their registrar or where domain owner hosted his domain