On Fri, 18 Jan 2008 12:56:45 -0500 (EST), Hakan wrote:
>Dave,
>
>I wsas hoping that the 'net traffic originated by the Win application
>running in VPC would then be "managed" by the host operating system,
>i.e., eCS 1.2MR in my case, and that a program that logs all network
>card traffic would log also this traffic. Given that I would not do
>anything else on the 'net at the same time, I am hoping that it would
>be feasible to figure out what the Win application sends and receives.
iptrace should see it - provided you are not using virtual switch. I
know that does *not* work. If using the NAT mode does not show up in
iptrace then *nothing* you run on the host will see anything. As I said
you will need a hub and a *nix box with snoop or similar on it.
The reason you need a hub is that hubs send everything they get to all
ports. Normally a box only acts on packets with it's own address in. A
sniffer gets the NIC to pass everthing and that is how it sees the
packets from the other machine. A switch OTH makes "virtual circuits"
between it's ports because it "knows" what is connected to each. So a
box can not see anything not directed at it. This is why, with a hub, a
massive FTP between two boxes will kill performance for everything
else. With a switch you don't notice anything - because you never see
the FTP packets.
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