Temporarily blocking ports

[Jos Chrispijn]

 From your reply on my message of 29-11-2008 21:47:
> An even tighter practice is to turn off all password logins and
> use only keyed connections. This is easier than it might seem
> though I'll admit I think of ssh as something only a select
> number of users may use and thus you know them by name
> and what IPs they are permitted to connect on.
I have been thinking of that as well, but don't think I should use that 
yet with the knowledge I have on this.
Do you refer to manual of automatic key connections?

thanks for sharing,
Jos Chrispijn