Disabling DHCPv6 requests

[Duane Whitty]

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On 16-09-12 11:36 PM, Peter Silva wrote:
> Go into Network Manager GUI / Edit Connections /
> 
> Bring up the connection you are using.  There is an IPv6 tab. 
> Change it from "Automatic" to "Manual"
> 
> and the dhclient should stop asking for ipv6.
> 
> btw.  I have been using dual-stack ipv4 and ipv6 for years.  It's
> not something you need to disable ipv6 works fine.
> 
> 

Disabling ipv6 in the Network Manager GUI works on a per connection
basis.  Thanks for pointing me there.

I updated all entries in /etc/NetworkManager/system-connections to set
[ipv6]
method=ignore

I wish I could tell NM to do this globally for all connections but it
isn't possible.  In the future I might be saying the same thing for ipv4
.

Also, I had disabled ipv6 in the kernel via sysctl.conf and in grub
before I updated NM.  NM was needed to make it clean however.

I think all that was really necessary was grub and NM because when you
disable ipv6 in grub the sysctl knobs for ipv6 disappear from sysctl -a

In /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1 quiet splash"

sudo update-grub


All replies were greatly appreciated!

Best Regards,
Duane

- -- 
Duane Whitty
duane at nofroth.com
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