ssh forwarding question

[Pollywog]

On Tuesday 04 September 2007 00:13:13 Pollywog wrote:
> On Monday 03 September 2007 23:08:45 Predrag Punosevac wrote:
> > Pollywog wrote:
> > > bind: Can't assign requested address
> > > channel_setup_fwd_listener: cannot listen to port: 15901
> > > Could not request local forwarding.
> >
> > It seems to me that you have a problem with a firewall. Look at your own
> > message. It looks like port 15901 is closed for listening.
>
> Here is another clue.  Something seems to be wrong with the loopback:
>
> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
>         inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
>         inet6 ::1 prefixlen 128
> ripple# ping localhost
> PING localhost (127.0.0.1): 56 data bytes
> ping: sendto: Can't assign requested address
> ping: sendto: Can't assign requested address
> ping: sendto: Can't assign requested address
> ping: sendto: Can't assign requested address
> ping: sendto: Can't assign requested address
> ping: sendto: Can't assign requested address
>
> I have not set up a firewall on this host, so the problem is something
> else, perhaps the output above from ifconfig helps.

Yes that was the problem.  I did this:

ifconfig lo0 127.0.0.1 netmask 255.0.0.0

After that I could ping localhost and my VNC connection via SSH succeeded.
Now how do I fix this problem permanently in FreeBSD, by running sysinstall 
again and setting the loopback address from there?