mikaela.github.io/n/dns.md

DNS notes

For DNS resolvers, refer to r/resolv.tsv

• Identifying DNS resolver
• Identifying support for client-subnet
• Mobile applications
  • FFUpdater

Identifying DNS resolver

• DNS-OARC’s Check My DNS - popup under “Network”.
• dnsleaktest
• whatsmydnsserver
• ipleak.net
• dnsadblock

The above list is based on redirect2me/which-dns README alternatives section

Identifying support for client-subnet

Or what is being sent to the authoritative servers.

dig +short TXT o-o.myaddr.l.google.com.
dig +short TXT whoami.ds.akahelp.net.
dig +short TXT whoami.ipv6.akahelp.net.
dig +short TXT whoami.ipv4.akahelp.net.

• Note: Cloudflare sends ECS only for whoami.ds.akahelp.net.

Mobile applications

With the exception of those apps that config I remember otherwise or share it with desktop versions etc.

FFUpdater

• https://open.dns0.eu;2a0f:fc80::ffff;2a0f:fc81::ffff;193.110.81.254;185.253.5.254