How to Disable IPv6

[StephenM]

It seems that IPv6 does work on an ARM device running 4.2.41

ifconfig reports eth0 as having an IPv6 address.

How do I disable IPv6?

There are no options to do this on networking section in the Control Panel.

[TMzethar]

210series, arm, TOS4 device do not have this option.
Perhaps you can do this by setting the relevant options for your router.

[AlAleksiev]

Hi guys, just saw that thread - it's kind of old, but I'll put some notes here to serve eventually in the future for a similar question.

You can always stop IPv6 on a linux. The example I'll write is for debian based distributions - that's where TOS v6.X is currently.
PLease mention the prompt '#' - that means root! If you are with that prompt '$', you'll need to add one 'sudo ' in front of those commands or when edditing file with vi!

This will stop IPv6 for the currently running appliance - it's not going to survive reload and that's good approaach as initial testing for side effect with whatever you are running!

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# sysctl -w net.ipv6.conf.all.disable_ipv6=1
# sysctl -w net.ipv6.conf.default.disable_ipv6=1
# sysctl -w net.ipv6.conf.lo.disable_ipv6=1
#

If you want to have IPv6 disabled for good, add in /etc/sysctl.conf file those lines:

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# Permanently disable IPv6
net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.default.disable_ipv6=1
net.ipv6.conf.lo.disable_ipv6=1

and apply those changes

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# sysctl -p

To valisate you can always use

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# ip a | grep v6

if there are no output, you have the IPv6 disabled.

Good luck!