Re: [exim] RFC 1413 default on debian

Marc Haber wrote:
> For the archive, better let's make it explicitly clear: Rejecting a
> connection attempt does not reveal any more information than dropping
> the connection attempt gives. A "drop" gives an attacker the
> information that something is there. And that it is desperately trying
> to be invisible.

I don't follow on this. If you "drop" a packet (as I understand it, dropped
packets mean no data is returned), how can someone know the device is there
or not? What's the difference between say dropping a packet and unplugging
the ethernet cable? (I realize that arp packets would be replied to,
however, in a routed environment, you won't see these replies)

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