disabel IPv6 Ubuntu 22.0 Cloud Image

[Pampa Party]

Hi,

i tried following without succes:

1.

nano /etc/sysctl.d/99-sysctl.conf

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

2.

sudo nano /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash ipv6.disable=1"

sudo update-grub

3.

write_files:
  - path: /etc/sysctl.d/10-disable-ipv6.conf
    permissions: 0644
    owner: root
    content: |
      net.ipv6.conf.eth0.disable_ipv6 = 1
runcmd:
  - systemctl restart systemd-sysctl

4. tried to use nmcli but i probably lacking of knowledge here as well.

5. Other things i can´t remember

If anybody could help me out here would be lovely, cause im starting to questioning my life.

LG

 

[turtle666]

Did you reboot the machine after you made those changes? What's the output of:

sysctl -a | grep -F 'net.ipv6.conf.all.disable_ipv6'
ip addr

 

[Pampa Party]

yes i rebooted, but always had and still have a ipv6 adress. i checked it with

cat /proc/sys/net/ipv6/conf/all/disable_ipv6

Result was always 0, also i see in the proxmox gui for the vm the ipv6 adress

 

[turtle666]

Okay. Can you recursively search for this just to see if something is overriding your previous settings? Note the inclusion of 'R'.

grep -RF 'net.ipv6.conf.all.disable_ipv6' /etc/sysctl*

 

[Pampa Party]

Okay. Can you recursively search for this just to see if something is overriding your previous settings? Note the inclusion of 'R'.

grep -RF 'net.ipv6.conf.all.disable_ipv6' /etc/sysctl*

grep -RF 'net.ipv6.conf.all.disable_ipv6' /etc/sysctl*
/etc/sysctl.conf:net.ipv6.conf.all.disable_ipv6 = 1
/etc/sysctl.d/99-sysctl.conf:net.ipv6.conf.all.disable_ipv6 = 1

 

[turtle666]

Hmm. Did you happen to compile your own kernel where IPv6 is builtin rather than a module?

 

[Pampa Party]

Hmm. Did you happen to compile your own kernel where IPv6 is builtin rather than a module?

no