IPV6 Tunnel from MAC/Linux

It is really easy to establish an ipv6 network tunnel from your machine directly. Make your network/system/services IPv6 ready :)

Create a ipv6 regular tunnel from any connection brokers: List of IPV6 tunnel brokers

I have used Hurricane Electric which is free tunnel broker.
Tunnel Broker

With the tunnel broker, you can create a tunnel by specifying your public ipv4 address in their website.

Once the tunnel is created with tunnel broker, Configure your machine with required interfaces , tunnel and routing.

    For MAC OS X:

1) Configure tunnel
$ sudo ifconfig gif0 tunnel host_ip tunnel_broker_ipv4_ip

If you are behind a natd network specify your machine private address as host_ip, otherwise mention the current public ip assigned to your machine. If you are behind a nat’d network make sure that protocol 41 is allowed in the nat’d device.
eg:
$ sudo ifconfig gif0 tunnel 192.168.1.2 216.66.xxx.xxx

2) Setup the tunnel end points

$ sudo ifconfig gif0 inet6 host_ipv6_address tunnel_broker_ipv6_address prefixlen 128

Both these ipv6 addresses are assigned by the tunnel broker.
eg:
$ sudo ifconfig gif0 inet6 2001:470:xxxx:xxxx::2 2001:470:xxxx:xxxx::1 prefixlen 128

3) Add the default route for ipv6 traffic
$ sudo route -n add -inet6 default tunnel_broker_ipv6_address

eg:
$ sudo route -n add -inet6 default 2001:470:xxxx:xxxx::1

Now you should be able to access the ipv6 networks :)

Incase of any issues, just make sure that ipv6 is enabled on the interface using:

$ sudo ip6 -x gif0

Test your ip6 connectivity:


$ ping6 ipv6.google.com
$ telnet ipv6.google.com 80

    For Linux:

The procedure is exactly same on linux as well:

Make sure that the ipv6 module is present in the kernel:

$ sudo modprobe ipv6

Create the tunnel
$ sudo ip tunnel add he-ipv6 mode sit remote 216.66.xx.xx local 192.168.1.2 ttl 255
* use the public ip if it is directly assigned to your machine

Activate the tunnel
$ sudo ip link set he-ipv6 up

Assign ip address to interface:

$ sudo ip addr add 2001:470:xxxx:xxxx::2/64 dev he-ipv6

Add default route for ipv6:

$ sudo ip route add ::/0 dev he-ipv6

Add protocol family identifer:

$ sudo ip -f inet6 addr

./arun

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