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Posted by Chris F Clark on October 23, 2006, 1:39 pm
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>>
>> BTW, one simple (and cheap) way to test if it is your computer
>> generating the traffic, is to leave the modem (and router) on and turn
>> the computer off. If the router doesn't disconnect after your doing
>> that for an appropriately long period (your 15 mins), then you
>> probably don't have the router's settings right yet. If turning your
>> computer off makes the router disconnect, then it is probably computer
>> generated traffic (or the router sensing the ethernet card in your
>> computer). If turning the computer off makes the modem disconnect,
>> you can see if it is the ethernet card by putting a password on your
>> computer so that you have to login, and restarting your computer, but
>> not logging in. That will leave your ethernet card on, but because
>> you haven't logged in, no programs should be running on your machine
>> generating traffic.
>>
>> Hope this helps,
>> -Chris
>
> There is another possibility here.
> Some years ago I had a significant problem with the modem/router pair being
> quite active when the computer was not in use. This was in win98 days,
> before all the 'phone home' concerns.
> It ended up that a few of the web sites I had visited kept sending whatever
> they needed to, to keep the connection open. Apparently this was done to
> enable faster access to their content (ads?) if I re-opened IE or Netscape
> You may wish to examine your incoming/outgoing traffic from the router and
> compare that to what is reported by the computer.
> If you modem or router is receiving packets, you will not get a period of
> inactivity when your computer is shut down.
>
> Stuart
And, because this is traffic from the outside in, your software
firewall (on the computer) will drop it, but it will get through to
your router, which is before the software firewall. If you are using
a firewall in the router itself, then the router will still get the
traffic but drop it. Thus, it will still be flowing through the
modem, keeping it active.
So, if you have outside traffic coming in, your link may still be
active, and thus your router not disconnecting, even if you have it
configured "right" (i.e. to disconnect on inactivity).
-Chris
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