[MUD-Dev] Gearing up against GEAR
J C Lawrence
claw at 2wire.com
Wed Jul 25 19:53:50 New Zealand Standard Time 2001
On Wed, 25 Jul 2001 11:23:26 +0200
Vincent Archer <archer at frmug.org> wrote:
> You see, the client needs to lie. And lying leads to
> inconsistencies. For example, you can ping the client. You have a
> RTT (measured server side, so assumed valid), so an accurate
> relationship between the time *reported* by the client and the
> server. You can do the same spot check at any time (classic
> police: repeat the question multiple times; when the suspect
> starts giving out differing answers, he might be lying) to measure
> the drift.
Posit a Windows box running an NTP daemon that also has a
significantly wrong system clock. The relative clock drift between
your server and the client will change steadily and fairly
consistently as the NTP daemon slowly adjusts the system clock
J C Lawrence )\._.,--....,'``.
---------(*) /, _.. \ _\ ;`._ ,.
claw at kanga.nu `._.-(,_..'--(,_..'`-.;.'
http://www.kanga.nu/~claw/ Oh Freddled Gruntbuggly
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