How to disable IPv6 in Ubuntu 14.04?
To disable ipv6, you have to open /etc/sysctl.conf
using any text editor and insert the following lines at the end:
 net.ipv6.conf.all.disable_ipv6 = 1
 net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
If ipv6 is still not disabled, then the problem is that sysctl.conf
is still not activated.
 $ sudo sysctl -p
You will see this in the terminal:
net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1
After that, if you run:
$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
It will report: 1 If you see
1
, ipv6 has been successfully disabled.