[geeks] QUESTION: why would a program suddenly start using IPv6?

[der Mouse]

> For a long time now, I've used one of my Sun machines as a subversion
> server.  [...svnserve...]

> I finally ran lsof and found out that svnserve was listening on an
> IPv6 address.

*Instead of* an IPv4 address?  That's just...broken.  At least, that's
my first reaction; I'd need details to be competent to hold a proper
opinion.

> QUESTIONS:

> Why would svnserve suddenly start defaulting to an ipv6 address when
> no other servers I run do?  svnserve has not been updated, and
> neither has its configuration.

> I don't run IPv6 anything on purpose, and haven't changed the
> configuration on this machine in a long time now.

> However, just in case I was "sleep administrating" or something like
> that, any idea what I might have changed that would cause this?

Perhaps the machine's hostname now has an IPv6 address in the DNS?

Perhaps you changed something (like libc or the kernel) that's used by
svnserve?  (The kernel alone might be enough, if it meant that
interfaces that used to have no v6 addresses now do - even if just
link-local addresses.)

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