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From Tom Evans <>
Subject Re: [users@httpd] incoming IP connect
Date Tue, 08 Feb 2011 16:52:05 GMT
On Tue, Feb 8, 2011 at 4:41 PM, Mike Brown <> wrote:
> On Tue, Feb 08, 2011 at 02:00:24PM +0000, Tom Evans wrote:
>> > Then the ethernet ports on both computers
>> > would "see" IP traffic meant for each other.
>> No.
> Ah, but that is indeed what happens.  If a hub is used, all packets are placed
> onto all of the jacks of the hub, therefore both computers will see port 80
> packets.  Switches route traffic to the appropriate jack of the switch, hubs
> do not.
> When I wanted to snoop all traffic that a computer was seeing and generating,
> I'd use a hub to connect the computer I wanted to snoop and he computer doing
> the snooping.
> Yes, the builtin snooping facility of the computer I was trying to track the
> traffic on should do the trick.  But, in some circumstances I needed a third-
> party snooper.
> MB

As I've said, you are welcome to your opinions.

If you use Listen *:80, and use a hub, your apache instance will not
start responding to requests on port 80 directed to another computer
on the same hub. Seriously.


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