Thanks Marc for your email. With the grub option, the IPv6 feature itself may have been removed from the running Linux kernel. But, I want IPv6 functionality to be present in the kernel but with the capability to enable or disable it.If disabled, IPv6 should be disabled on current namespaces and future namespaces, until I enable IPv6 again.Is this possible in Linux?DheerajOn Tue, Jun 7, 2022 at 2:38 PM <marcoshalano@gmail.com> wrote:Dheeraj,
You don't need to touch the /etc/sysctl.conf. You need to touch your bootloader configuration file. You can see an example of how to do it here: https://www.thegeekdiary.com/centos-rhel-7-how-to-disable-ipv6/
On 07/06/2022 15:33, Dheeraj Kandula <dkandula@gmail.com> wrote:
> Thanks Bjørn for your response. I think I am getting a bit confused here.
>
> I booted up my Linux VM and set the following in my /etc/sysctl.conf file:
>
> net.ipv6.conf.all.disable_ipv6=1
> net.ipv6.conf.default.disable_ipv6=1
>
> I saved the file.
>
> *I rebooted my VM.*
>
> After reboot, I check the value of
> "/sys/module/ipv6/parameters/disable_ipv6". *It is still 0.*
>
> As it is still 0, the new namespaces are created with IPv6 enabled. Is
> this a bug in the kernel code?
>
> Dheeraj
>
> On Tue, Jun 7, 2022 at 2:17 PM Bjørn Mork <bjorn@mork.no
> <mailto:bjorn@mork.no>> wrote:
>
> Dheeraj Kandula <dkandula@gmail.com <mailto:dkandula@gmail.com>> writes:
>
> > On my system I see the following values:
> >
> > $cat /sys/module/ipv6/parameters/disable_ipv6
> > 0
>
> Yes, that's the default unless you change it..
>
> > Are you suggesting that "cat
> /sys/module/ipv6/parameters/disable_ipv6"
> > should be 1?
>
> Yes, And if you boot with "ipv6.disable_ipv6=1" on the command line,
> then it will be.
>
>
> Bjørn
>
>