Re: Permanent Use of IPv4

[Grzesiek Sójka <pld@sojka.co>]

On 2/15/19 4:12 PM, Stephen P. Molnar wrote:
> Thanks for help from this gropup I can force the use of IPv4 by 
> running:  sysctl -w net.ipv6.conf.all.disable_ipv6=1.


If you would like to prevent the kernel from loading IPv6 simply add the 
following: ipv6.disable=1 to the kernel boot parameters. If you use lilo 
then in the /etc/lilo.conf should be line beginning with append:

image=/boot/vmlinuz
        root=/dev/md0
        label=DebianSid
	initrd=/boot/initrd.img
	append="net.ifnames=0 biosdevname=0 ipv6.disable=1"

In case of grub.conf search for the line beginning with "linux":

# For booting GNU/Linux
menuentry "Stretch - remote" --id deb {
	set root=(hd0,msdos2)
	linux /boot/vmlinuz root=/dev/sda2 net.ifnames=0 biosdevname=0 
ipv6.disable=1
	initrd /boot/initrd.img
}

After reboot you should see ipv6.disable=1 in /proc/cmdline

Greg