Disable IPv6 by default.

[Chuck Anderson]

On Fri, Sep 14, 2007 at 10:25:31AM +0200, Laurent Rineau wrote:
> On Thursday 13 September 2007 21:12:54 Chris Adams wrote:
> > My main problem is that I configure IPv4 and I explicitly have IPv6
> > turned off (or so it appears in the interface), yet I still have IPv6
> > loaded and used.  This causes annoying warnings from programs trying to
> > use an unconfigured IPv6 interface.
> >
> > If I don't configure IPv4, the interface isn't configured; why is it
> > that way with IPv6?  If I don't configure anything for IPv6, it is still
> > loaded.
> 
> It is the way of doing for a end-user machin, in IPv6: you do not need to 
> configure your IPv6 parameters. If an IPv6-enabled router exists in your 
> local network, it will broadcast the needed configuration. In a sens IPv6 is 
> more "plug and play" than IPv4. For that mecanism to work, IPv6 interfaces 
> are always up.

Recent OSes including Fedora do configure IPv4 automatically too.  
You'll see 169.254.x.x addresses appear if there is no DHCP server 
response.