I'm unable to ping many websites in my Amazon AWS EC2 instance, including github. It's an IPv6-only instance, and includes an internet gateway and a routing table that associates with that gateway. The routing table includes a route to the internet gateway.

Whenever I ping github.com, I get ping: connect: Network is unreachable. I am able to ping google.com from that instance. For my default VPC (ipv4), I'm able to ping github just fine from EC2 instances. Thanks for the help!

CodePudding user response：

IPv4 clients can’t talk to it directly to a IPv6 only Server. Google has IPv6 configured for their website but github.com does not. (But as I understand it they are close to suport it now)