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I have static public /32. My ISP intercepting DNS traffic for censorship purposes. But i strongly doubt that this traffic is forwarded somewhere.

  [user@v-fed-1 ~]$ dig txt o-o.myaddr.test.l.google.com @8.8.8.8 +short
  "173.194.98.4"
  "edns0-client-subnet 94.181.44.185/32"
  [user@v-fed-1 ~]$ dig txt o-o.myaddr.test.l.google.com @8.8.8.8 +short
  "173.194.98.4"
  "edns0-client-subnet 94.181.44.185/32"
  [user@v-fed-1 ~]$ dig txt o-o.myaddr.test.l.google.com @8.8.8.8 +short
  "173.194.98.4"
  "edns0-client-subnet 94.181.44.185/32"

  [user@v-fed-1 ~]$ dig txt edns-client-sub.net @8.8.8.8 +short
  "{'ecs_payload':{'family':'1','optcode':'0x08','cc':'RU','ip':'94.181.44.0','mask':'24','scope':'0'},'ecs':'True','ts':'1522656335.56','recursive':{'cc':'FI','srcip':'74.125.74.4','sport':'40964'}}"
  [user@v-fed-1 ~]$ dig txt edns-client-sub.net @8.8.8.8 +short
  "{'ecs_payload':{'family':'1','optcode':'0x08','cc':'RU','ip':'94.181.44.0','mask':'24','scope':'0'},'ecs':'True','ts':'1522656336.4','recursive':{'cc':'US','srcip':'74.125.46.4','sport':'51510'}}"
  [user@v-fed-1 ~]$ dig txt edns-client-sub.net @8.8.8.8 +short
  "{'ecs_payload':{'family':'1','optcode':'0x08','cc':'RU','ip':'94.181.44.0','mask':'24','scope':'0'},'ecs':'True','ts':'1522656337.96','recursive':{'cc':'US','srcip':'74.125.46.4','sport':'54992'}}"

127.1 is a DNS-over-HTTPS proxy.

  [user@v-fed-1 ~]$ dig txt o-o.myaddr.l.google.com @127.1 +short
  "173.194.98.11"
  "edns0-client-subnet 94.181.44.0/24"
  [user@v-fed-1 ~]$ dig txt o-o.myaddr.l.google.com @127.1 +short
  "173.194.98.11"
  "edns0-client-subnet 94.181.44.0/24"
  [user@v-fed-1 ~]$ dig txt o-o.myaddr.l.google.com @127.1 +short
  "173.194.98.6"
  "edns0-client-subnet 193.151.48.130/32

Some story from other (business) connection.

  [user@v-fed-1 ~]$ dig txt o-o.myaddr.l.google.com @8.8.8.8 +short
  "74.125.74.3"
  "edns0-client-subnet 37.113.134.30/32"
  [user@v-fed-1 ~]$ dig txt o-o.myaddr.l.google.com @8.8.8.8 +short
  "74.125.46.4"
  "edns0-client-subnet 85.29.165.14/32"
  [user@v-fed-1 ~]$ dig txt o-o.myaddr.l.google.com @8.8.8.8 +short
  "173.194.98.13"
  "edns0-client-subnet 77.234.25.49/32"

discuss

sashametro|8 years ago

If you run those commands without the +short you will see that the TTL values for those responses are less than 59 (which for Google Public DNS, indicates they are cached, and explaining why the IP addresses shown are not yours).

The o-o.myaddr.l.google.com domain is a feature of Google's authoritative name servers (ns[14].google.com) and not of 8.8.8.8. You can send similar queries through 1.1.1.1 (where you will see that there is no EDNS Client Subnet data provided, improving the privacy of your DNS but potentially returning less accurate answers, as Google's authoritative servers do not have your IP subnet, but only the IP address of the CloudFlare resolver forwarding your query.

DesertBattery|8 years ago

Aren't o-o.myaddr.l.google.com is intended for troubleshooting and should show correct ECS? o-o.myaddr.test.l.google.com always show correct ECS.