how to force all packets to be ipv4 not v6

[Lowell Gilbert]

Mario Lobo <lobo at bsd.com.br> writes:

> On Sun, 31 Mar 2013 01:20:17 -0400
> Aryeh Friedman <aryeh.friedman at gmail.com> wrote:
>
>> I have a host that for ISP reasons must have a ipv6 addr as well as
>> the ipv4 but the ISP does not offer external ipv6 routing but all the
>> commanes (ssh, ftp, etc.) default to ipv6 and need special options to
>> use 4 is there anyway to force them to always use 4?
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>
> A kick and dirty way would be to comment the line:
>
> options 	INET6	# IPv6 communications protocols
>
> from your kernel config and recompile.

That breaks the "must have a ipv6 addr" requirement. 

The way to do this without completely disabling IPv6 used to be to
configure ipv6_prefer, but that appears to have been superseded by
ip6addrctl_policy.