IPv6 app store rejection for app querying IPv4 server

Question

My App for Iphone/Ipad connects to a server, transmits data from this server by JSON and shows the data to the user in form of lists and graphs. The server in question " https://www.myfxbook.com " is not IPv6 compliant.

Apple's Appstore-review team keeps rejecting my app since they can't reach this server (which does not have an AAAA-record) within their test set-up.

I followed their advice to set up and test IPv6 connectivity in my place where I found that from my IPv6 network I could reach the IPv4-server. But obviously the Appstore-review team uses a pure IPv6 setup

using the "dig" command I found the following response within my NAT64 network

iMac:myfxtract XXXXXX$ dig -t AAAA https://www.myfxtract.com

; <<>> DiG 9.8.3-P1 <<>> -t AAAA https://www.myfxtract.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 55233
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
 ;https://www.myfxtract.com.    IN  AAAA

;; AUTHORITY SECTION:
com.            600 IN  SOA a.gtld-servers.net. nstld.verisign-grs.com.    1492237025 1800 900 604800 86400

;; Query time: 30 msec
;; SERVER: 2001:730:3e62::53#53(2001:730:3e62::53)
;; WHEN: Sat Apr 15 08:17:26 2017
;; MSG SIZE  rcvd: 116

If anyone has the same situation and could offer me some advice on the issue ? Been "talking" to Apple-hotlines for weeks to no avail...

Answer 1

The solution was to be resilient about the difference between testing within own NAT64 and the Appreview network. My app was finally accepted without further comment

Answer 2

Please check below link for support for ipv6

IPv6 App Store Rejection

After that please verify below points in your app

In the app rejection, if there are any crash logs are attached then please symbolicate it and try to find the exact location where your app is crashing. For symbolicating crash please check below link

1. https://developer.apple.com/library/content/technotes/tn2151/_index.html

2. Symbolicating iPhone App Crash Reports

Please check with your server for supporting ipv6 environment.

Check for third party libraries which are used in your app. And make sure that these libraries are ready to use in ipv6 environment

Test your app in ipv6 environment. To test your app in ipv6 environment please check below link about how to test your app in ipv6 environment

1. https://developer.apple.com/library/content/documentation/NetworkingInternetWeb/Conceptual/NetworkingOverview/UnderstandingandPreparingfortheIPv6Transition/UnderstandingandPreparingfortheIPv6Transition.html

2. https://developer.apple.com/support/ipv6/

If above all points are checked and your app is working fine. Then please contact apple for rejection of app.