Error when trying sync time using ntp

Taavi Burns jaaaarel-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org
Mon Jan 10 19:48:19 UTC 2005


On Mon, 10 Jan 2005 13:04:16 -0500, Chris Gow <sniffy-bJEeYj9oJeDQT0dZR+AlfA at public.gmane.org> wrote:
> Yeah. My firewall was/is blocking ntp UDP requests. Since I only want/need to
> sync the time when my laptop boots, I've added a startup script that executes
> before the firewall starts up. Of course for some reason, host names can't be
> resolved when it runs (though the network has started up by then :( ). Oh
> well, that's another problem.

You mean that your network interface comes up before your firewall?  Tsk tsk.

That's a big no-no.  Not quite as bad as starting services before starting up
the firewall, but still a no-no.  What's the point of a firewall if
it's not ALWAYS
guarding your network interfaces?

Why not add ntp packets to the allowable list?  If it's just during startup, you
could even alter the firewall rules to allow it, do the ntp bits, and
then remove
the firewall rule.  But that much work is probably only worth it if you're truly
paranoid, and it sounds like you're not (running up the firewall after
the interface
comes up, that is).  ;)

-- 
taa
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