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[public-dns-discuss] Google DNS resolver fails for wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws



Hi,

I have been having issues with uploading files to WeTransfer since yesterday from France using 8.8.8.8/8.8.4.4. Works with my ISP's DNS resolver. Same behaviour can be observed on different machines (laptops, smartphones).

Following the troubleshooting guide at https://developers.google.com/speed/public-dns/docs/troubleshooting :


Step 1: looks OK, can't really tell...

- https://intodns.com/s3.eu-west-1.amazonaws.com
- http://dnsviz.net/d/wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws/dnssec/


Step 2: looks OK, ends with:

13  8.8.8.8  23.758 ms  19.020 ms


Step 3: this is getting interesting:

$ dig wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @8.8.8.8


; <<>> DiG 9.10.6 <<>> wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @8.8.8.8

;; global options: +cmd

;; connection timed out; no servers could be reached



Step 4: same result

$ dig wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @8.8.8.8 +cd


; <<>> DiG 9.10.6 <<>> wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @8.8.8.8 +cd

;; global options: +cmd

;; connection timed out; no servers could be reached



Step 5: works fine with other open resolvers:

$ dig wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @4.2.2.1


; <<>> DiG 9.10.6 <<>> wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @4.2.2.1

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9828

;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0


;; QUESTION SECTION:

;wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com. IN A


;; ANSWER SECTION:

wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com. 1 IN CNAME s3.eu-west-1.amazonaws.com.

s3.eu-west-1.amazonaws.com. 1 IN A 52.218.104.154


;; Query time: 37 msec

;; SERVER: 4.2.2.1#53(4.2.2.1)

;; WHEN: Sat Oct 20 20:04:41 CEST 2018

;; MSG SIZE  rcvd: 102


$ dig wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @4.2.2.2


; <<>> DiG 9.10.6 <<>> wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @4.2.2.2

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46915

;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0


;; QUESTION SECTION:

;wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com. IN A


;; ANSWER SECTION:

wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com. 1 IN CNAME s3.eu-west-1.amazonaws.com.

s3.eu-west-1.amazonaws.com. 1 IN A 52.218.48.36


;; Query time: 28 msec

;; SERVER: 4.2.2.2#53(4.2.2.2)

;; WHEN: Sat Oct 20 20:04:45 CEST 2018

;; MSG SIZE  rcvd: 102


$ dig wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @208.67.222.222


; <<>> DiG 9.10.6 <<>> wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @208.67.222.222

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44582

;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1


;; OPT PSEUDOSECTION:

; EDNS: version: 0, flags:; udp: 4096

;; QUESTION SECTION:

;wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com. IN A


;; ANSWER SECTION:

wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com. 37 IN CNAME s3.eu-west-1.amazonaws.com.

s3.eu-west-1.amazonaws.com. 5 IN A 52.218.48.60


;; Query time: 23 msec

;; SERVER: 208.67.222.222#53(208.67.222.222)

;; WHEN: Sat Oct 20 20:04:55 CEST 2018

;; MSG SIZE  rcvd: 113


$ dig wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @208.67.220.220


; <<>> DiG 9.10.6 <<>> wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com @208.67.220.220

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17413

;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1


;; OPT PSEUDOSECTION:

; EDNS: version: 0, flags:; udp: 4096

;; QUESTION SECTION:

;wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com. IN A


;; ANSWER SECTION:

wetransfer-eu-prod-outgoing.s3.eu-west-1.amazonaws.com. 300 IN CNAME s3.eu-west-1.amazonaws.com.

s3.eu-west-1.amazonaws.com. 5 IN A 52.218.64.236


;; Query time: 35 msec

;; SERVER: 208.67.220.220#53(208.67.220.220)

;; WHEN: Sat Oct 20 20:05:01 CEST 2018

;; MSG SIZE  rcvd: 113




Best regards,
Jonathan

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