Debian 12 - Disable IPv6

It occasionally comes up that I just need to disable IPv6 for whatever reason. Below is the easiest and most straightforward way if you are using Debian 12 or similar.

Steps

Create the a file called "/etc/sysctl.d/60-custom.conf"

sudo editor /etc/sysctl.d/60-custom.conf

... with the following 3 lines:

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

sudo sysctl -p
sudo systemctl restart procps

References

• Linuxbabe - 2 Ways to Disable IPv6 on Ubuntu Desktop & Server