Unable To Hit Shopify Requests From Ec2 Instance

Everything was working fine till yesterday/today midnight. But today we are unable to access shopify REST apis from our ec2 instance located in Bombay (ap-south-1). The dns resolves correctly to the shopify shop:

[[email protected] ~]$ dig

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.68.rc1.58.amzn1 <<>>
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52296
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;       IN  A

;; ANSWER SECTION:    30  IN  CNAME    8   IN  A

;; Query time: 0 msec
;; WHEN: Sat Jun  1 06:13:17 2019
;; MSG SIZE  rcvd: 73

Hitting the shop for any REST apis doesn't work:

[[email protected] ~]$ curl -vX GET   -H 'Accept: */*'   -H 'Authorization: Basic Auth'
Note: Unnecessary use of -X or --request, GET is already inferred.
*   Trying
* connect to port 443 failed: Connection timed out
* Failed to connect to port 443: Connection timed out
* Closing connection 0
curl: (7) Failed to connect to port 443: Connection timed out

Why are shopify calls failing from inside the ec2 instance? Restarting the server, flushing cache and bringing up a new machine have give me no results so far. Any help is appreciated.

Update: This issue is not there in us-east instances. So we created a proxy instance to route shopify calls from our app through the proxy server. This is not a long term solution and we are still looking for answers.



I still don't know what the issue was but here is the official communication from Shopify:

This is to let you know that early morning today there was a connectivity issue across Shopify's platform and this email is to inform you that your stores have been recovered, we understand that situations like this impact you, your business and your teams. The internet-wide network outage affected several services, including Shopify. Once the network has resorted please know our team worked to get your store online as soon as possible. In the coming days, we will work to fully understand how this widespread Internet infrastructure failure affected our platform.