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Checking IPv6 connectivity

Following commands are for a machine running Linux (more precisely: Linux Mint, derived from Ubuntu).

Getting IPv6 address

Use the ifconfig command. Take the inet6 address with global scope.

To check that this address can be reached from the Internet: https://www.ipaddressguide.com/ping6.

Checking outgoing connectivity

# Ping Google DNS.
ping6 -c 4 2001:4860:4860::8888