IPv6 server not reachable in Amazon Ec2

Keerthivasan asked:

I am working on a Apple iOS app, which uses the backend server running at Amazon EC2. Amazon EC2 VPC doesn’t support IPv6 address by native. I couldn’t make use of Amazon ELB support provided for EC2 classic platform, since my account uses VPC only

Apple Announcement

At WWDC 2015 we announced the transition to IPv6-only network services in iOS 9. Starting June 1, 2016 all apps submitted to the App Store must support IPv6-only networking.

HE Tunnel Broker Service

I have setup the tunnel. This is my IP6 Tunnel configuration. I’m able to ping and browse ipv6.google.com. I could also ping the IP6 Default gateway provided by HE tunnel broker service in EC2

Tunnel adapter IP6Tunnel:

   Connection-specific DNS Suffix  . : ap-southeast-1.compute.internal
   Description . . . . . . . . . . . : Microsoft Direct Point-to-point Adapater
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:470:35:b37::2(Preferred)
   Link-local IPv6 Address . . . . . : fe80::e8e6:1ae2:d639:619b%14(Preferred)
   Default Gateway . . . . . . . . . : 2001:470:35:b37::1
   DNS Servers . . . . . . . . . . . : 172.31.0.2
   NetBIOS over Tcpip. . . . . . . . : Disabled

DNS records for my domain

Name                     TTL    Class   Type         Data
ahlanapi.foodengine.in. 12634   IN      A           52.77.114.38
ahlanapi.foodengine.in. 299     IN      AAAA        2001:470:36:b37::2

I am able to access my website within EC2 and internet as well : http://ahlanapi.foodengine.in/ahlanapi/mumum/home

Problem in IPv6 validation test

When i perform the IPv6 test in http://ipv6-test.com/validate.php

It’s not able to connect to my IPv6 webserver listening at

Listen 0.0.0.0:80
Listen [2001:470:35:b37::2]:80

enter image description here

What might be the problem? Please let me know if you need more information

My answer:


The problem is simple. You have a typo in your DNS record.

Your IPv6 address is 2001:470:35:b37::2, but your AAAA record has 2001:470:36:b37::2.

You may resolve the problem by correcting the AAAA record.


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