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Thuong Tran
Asked: 2019-10-17 18:12:51 +0800 CST

Disable IPv4 on Ubuntu 16.04 LTS

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I want to create a pure IPv6 environment or disable IPv4 completely, not just on the interface. If it is impossible, I want to disable IPv4 on boot via the command line or a configuration file.

ipv6 16.04 ipv4

1 Answers

  1. Best Answer

    To make completely disabling ipv4 entirely impossible. After a quick check on make menuconfig on kernel 4.4.189. I could not find a way of disabling ipv4 without disabling the entire TCP/IP stack. enter image description here

    But you can disable IPv4 on interfaces with Network Manager: To list the active connections:

    $ nmcli connection show --active

    NAME     UUID                                               TYPE                     DEVICE 
Wired1   63e9c617-f3f8-416c-a40c-fbb460549169               802-3-ethernet           ens33

    Modify the property of ipv4.method to disabled

    $ nmcli connection modify 63e9c617-f3f8-416c-a40c-fbb460549169 ipv4.method disabled

    To apply the new settings. Let’s restart the networking:

    $ nmcli networking off

    $ nmcli networking on

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