Set IPv6 under ubuntu12.04

This blog post describes how to set up IPv6 in ubuntu12.04. 

1. Install miredo.

$ Sudo apt-get install miredo

2. Modify the IPv6 settings of the firewall

Open the ufw configuration file with the root permission: "/etc/default/ufw", find the "IPV6 = no" line, and change it to "IPV6 = yes ".

Finally, disable/enable the firewall to make the change take effect:

$ Sudo ufw disable

$ Sudo ufw enable

3. Restart the network

$ Sudo invoke-rc.d networking restart

4. test whether the setting is successful.

$ Ping6 ipv6.google.com

PING ipv6.google.com (2404: 6800: 4005: c00: 93) 56 data bytes

Ping: sendmsg: Operation not permitted

Ping: sendmsg: Operation not permitted

5. Set ip6tables

$ Sudo ip6tables-L (view ip6tables Firewall Rules)

$ Sudo ip6tables-t filter-a output-j ACCEPT