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[public-dns-discuss] Re: Google DNS resolving Google.com to...London?!



OK, so it's not a Google DNS issue. I set up Unbound as a local resolver and I'm getting the same thing. It's especially frustrating today as YouTube is now being served to me out of the London endpoint, meaning that I'm lucky to get smooth playback at 360p resolution. HD is impossible without buffering.

So it's obviously an issue with Google's internal CDN set-up/nameservers/whatever, not Google Public DNS (which makes sense, since I'm getting the same results from Google Public DNS, which passes my EDNS client subnet, as if I just run a resolver locally) and so off-topic for this mailing list. Alex or anyone else here, do you have contact info for someone in the right department at Google, or can someone here pass this along to the right place?

Local IP is 38.131.218.243, and my ASN is 55140. As we speak, I'm receiving YouTube content from lhr25s10-in-f165.1e100.net (216.58.198.165).

Thanks.

On Friday, January 12, 2018 at 5:05:22 PM UTC-5, Chris Luth wrote:
Just wanted to bump this and say there's been no change over the past week since I posted -- the exact endpoint fluctuates (today, it's 216.58.198.100), but it still resolves to some permutation of *lhr*.1e100.net with pings around 110ms.

On Thursday, January 4, 2018 at 12:52:00 PM UTC-5, Chris Luth wrote:
Thanks for the reply.

It's Windows, so I'm using nslookup, but with and without 8.8.8.8, I get 

edns0-client-subnet 38.131.218.243/32

and

"{'ecs_payload':{'family':'1','optcode':'0x08','cc':'US','ip':'38.131.218.0','mask':'24','scope':'0'},'ecs':'True','ts':'1515088007.77','recursive':{'cc':'US','srcip':'74.125.113.133','sport':'56313'}}"

Full results below. I'll not bother to obfuscate my ISP's CGNed public IP, as it's kinda pointless anyway. ;)

> set type=txt
Server:  router
Address:  192.168.56.1

Non-authoritative answer:

        "74.125.113.145"

        "edns0-client-subnet 38.131.218.243/32"
Server:  [8.8.8.8]
Address:  8.8.8.8

Non-authoritative answer:

        "74.125.183.72"

        "edns0-client-subnet 38.131.218.243/32"
Server:  router
Address:  192.168.56.1

Non-authoritative answer:
edns-client-sub.net     text =

        "{'ecs_payload':{'family':'1','optcode':'0x08','cc':'US','ip':'38.131.218.0','mask':'24','scope':'0'},'ecs':'True','ts':'1515087998.46','recursive':{'cc':'US','srcip':'173.194.94.129','sport':'50825'}}"
Server:  [8.8.8.8]
Address:  8.8.8.8

Non-authoritative answer:
edns-client-sub.net     text =

        "{'ecs_payload':{'family':'1','optcode':'0x08','cc':'US','ip':'38.131.218.0','mask':'24','scope':'0'},'ecs':'True','ts':'1515088007.77','recursive':{'cc':'US','srcip':'74.125.113.133','sport':'56313'}}"


On Thursday, January 4, 2018 at 1:48:20 AM UTC-5, Alex Dupuy wrote:
What do you see when you make the following dig queries?

dig TXT o-o.myaddr.test.l.google.com. # (with @8.8.8.8 and without, using default resolver configuration)
dig TXT edns-client-sub.net. # (with and without @8.8.8.8)

These would reveal what EDNS Client Subnet (ECS) data is being sent to authorities. Perhaps somehow your DNS requests are going out with ECS value of 100.64.103.1 (which is a Carrier Grade NAT address, no more meaningful than 192.168.56.1.

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