Getting rid of “IPv6 addrconf: prefix with wrong length 56”

Some hosting companies, notably OVH, have their networking set in a way that it constantly “pollutes” dmesg with the following messages:

Here is what you can do to get rid of it.

Add the following to /etc/sysctl.conf and run sysctl -p:

Great! You’ve successfully signed up.

Welcome back! You've successfully signed in.

You've successfully subscribed to

Success! Check your email for magic link to sign-in.

Success! Your billing info has been updated.

Your billing was not updated.