Disable IPv6 for quicker browsing (in some cases)

[machinebacon]

Most of you know it, but those who don't, here it goes:

IPv6, if not supported by your ISP, can make browsing painstakingly slow.

Method 1 - if your PC definitely boots with sysctl turned on (usually it does)

To disable IPv6 on your PC, first edit systctl.conf as root:

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sudo nano /etc/sysctl.conf

and add these lines

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net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

remove or comment all IPv6-related entries in the host file (thanks Alad for the pointer). They have something with 'ip6' in the line. Put a # in front.

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sudo nano /etc/hosts

As next, either reboot, or run

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sudo sysctl -p

Method 2 - Editing the GRUB to disable IPv6 before sysctl would kick in

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sudo nano /etc/default/grub

search for the kernel boot line starting with GRUB_CMDLINE_LINUX_DEFAULT

and add or append

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ipv6.disable=1

between the quotes.

Save and exit, then run

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sudo update-grub && sudo reboot

That's all about it. Good luck ;)

[Alad]

+1

Alternative way:

Append ipv6.disable=1 to /etc/default/grub, then sudo update-grub. With the sysctl method you may also want to comment out any ipv6 addresses in /etc/hosts

[machinebacon]

Ah of course, I add this! Thanks

The thing about GRUB, of course - it is not only an alternative way, but maybe the only way if sysctl is not loaded at boot-time at all. I'll merge your comment :)