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Subject: Re: Eliminating IPv6 (?)
To: "Ronald F. Guilmette" <rfg@tristatelogic.com>,
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From: Eugene Grosbein <eugen@grosbein.net>
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18.06.2019 10:10, Ronald F. Guilmette wrote:

> How can I turn off IPv6 entirely without rebuilding the kernel?

You cannot. GENERIC kernel specifically enables IPv6 support and you need to disable it at compile time.
And if you do, you better rebuild the world too using WITHOUT_INET6=yes in the /etc/src.conf
or else some utilities compiled with INET6 by default will query kernel
for IPv6-specific data (like routing entries) and complain that your kernel does not know about it.

World built WITHOUT_INET6 has no such rough edges.