How to disable IPv6 in Ubuntu

[Candace]

Hi all,

I am using Ubuntu in my system. The problem is with IPv6. I started Firefox to browse the internet then no website would open. If i are on a IPv4 network, I have to disable IPv6 on my computer and Firefox browser. Please advice. ??

[Dr. V]

You can disabling IPv6 right away at boot up your system. Using you preferred text editor edit the file /etc/default/grub and seem for a parameter: GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash”. You have to erase this entire line and change it with: GRUB_CMDLINE_LINUX_DEFAULT=”ipv6.disable=1 quiet splash”. After this, you have to subject this command in a terminal in order to update you excavate configuration: sudo update-grub. This will disable IPv6.

[SalVatore]

You need to disable IPv6 from Firefox Browser. For this , Type in about:config in your address bar of the firefox browser and hit enter. Click the I will be careful I promise button and ensue. In next step, type in network.dns.disableIPv6 in the filter. You will find that only one identical property shows up. Now twice click on the property record to change it’s value to true. Check and reply.

[jesse]

You can also disabe IPv6 from Network Manager of Ubunto, You need to goto System > Preferences > Network Connections in your Gnome desktop. Now hit it off on the connection you use and edit it by clicking on the edit button. In the Edit box you can find a tab called IPv6 Settings. All you need to do is just hit on that tab and select the way as Ignore from the drop down. Check it out and reply.

[Lillebror]

You can also disable the IPv6 from Ubunto by following command:
# Edit /etc/default/grub file
# gksudo gedit /etc/default/grub
Change

GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash”

to

GRUB_CMDLINE_LINUX_DEFAULT=”ipv6.disable=1 quiet splash”

then Save and exit the file. After that update the grub from the command line

sudo update-grub

[Calvin K]

If you disable IPv6 in Internet connection and DNS speeds , Follow tge steps:

# You should to edit the aliases file using the following command:

gksudo gedit  /etc/modprobe.d/aliases

# Find the line: alias net-pf-10 ipv6
# change to alias net-pf-10 off
# If the above change is not working you need to change alias net-pf-10 off ipv6
# Save the file and reboot