n/dns.md: add dig commands for ECS testing

This commit is contained in:
Aminda Suomalainen 2023-03-11 15:31:55 +02:00
parent 229468b25b
commit 783226216e
Signed by: Mikaela
SSH Key Fingerprint: SHA256:CXLULpqNBdUKB6E6fLA1b/4SzG0HvKD19PbIePU175Q

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@ -17,3 +17,16 @@ For DNS resolvers, refer to [r/resolv.tsv](/r/resolv.tsv)
- [dnsadblock](https://dnsadblock.com/dns-leak-test/)
The above list is based on [redirect2me/which-dns README alternatives section](https://github.com/redirect2me/which-dns/blob/main/README.md)
## Identifying support for client-subnet
Or what is being sent to the authoritative servers.
```bash
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.