Hi,
I have a purchase copy of the compiled Windows version of ntop (version 2.0
built on 27/12/2001) running on Windows NT.
I have also installed WinPcap 2.3.
It is installed on Compaq machine using Ethernet adapter
(\Device\Packet_CpqNF31)
I'd like to monitor traffic from and to another server (AS/400).
The ntop PC is connected to a switch with port mirroring enabled for the
port with the AS/400 (so it can see all the traffic from and to the AS/400).
I start ntop with following parameters:
C:\Program Files\ntop-Win32\ntop.exe -m <site IP>/16 src host> <AS/400
address> or dst host <AS/400 address>
 
Where <AS/400 address> is the IP address of the AS/400 and the <site IP> is
the class B address of the site (I'd like to differentiate between the
traffic originated lically from the site and the traffic coming over WAN).
The site has class B subnet.

THE PROBLEM is that I see traffic from the other machines to the machine
where ntop is installed. 

So it seems that the filter is not working.

I also tried the filter expressions 
host <AS/400 address>
and
IP host <AS/400 address>
 
But all three settings gave me SAME RESULTS!
 
On the bottom of the report I can read 
Generated by ntop v.2.0 MT [WinNT/2K/XP] (27/12/2001 build) listening on
[\Device\Packet_CpqNF31] without a kernel (libpcap) filtering expression 
Why does it say "without a kernel (libpcap) filtering expression" when I did
specify the filters?

Could you please help?

Thank you

Kind regards

Vaclav

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