Setting up Hurricane Electric IPv6 on Ubuntu

To set up Hurricane Electric (HE) IPv6 on Ubuntu, you will need to do the following:

Sign up for an account with Hurricane Electric and request a tunnel. This will give you a Tunnel Server (also known as an endpoint) and a Tunnel ID that you will need to configure the tunnel.

On your Ubuntu machine, install the "inetutils-inetd" package, which includes the "inetd" service that we will use to set up the tunnel:
sudo apt-get install inetutils-inetd

Create a new file called "sit1" in the "/etc/network/interfaces.d" directory with the following contents, replacing the values for "server" and "tunnel_id" with the values provided by Hurricane Electric:

auto sit1
iface sit1 inet6 v4tunnel
        address YOUR_IPV6_ADDRESS
        netmask 64
        endpoint YOUR_TUNNEL_SERVER
        local YOUR_IPV4_ADDRESS
        ttl 255
 sit1

enable the interface

sudo ifup sit1 

Start the "inetd" service:

sudo service inetutils-inetd start

Verify that the tunnel is up and running:

ip addr show sit1

Verify that you are able to reach the IPv6 internet by pinging an IPv6 address:

ping6 ipv6.google.com