Hi all,

Just wondering if anyone has seen the following problem:

We have a local subnet 10.20.0.0/255.255.0.0, however a user with an IP
address of 10.20.3.0 does not show up under any of the web tables with
Ntop. I tell ntop that 10.0.0.0/8 is a local network to make sorting the
hosts easier, but it doesn't show up under the "IP -> Summary ->
Traffic" table, either with the [All] option or [Local Option] selected.

How do I know 10.20.3.0 is doing anything at all? Tcpdump shows that a
lot (most) of the traffic on the monitored interface is related to this
host. The odd thing is, when I select (from the "IP -> Summary ->
Traffic" table) a remote host that 10.20.3.0 is making a connections to,
it shows the ports that connections are being made on - it doesn't list
the 10.20.3.0 host.

Is it possible that a.b.c.0 is assumed to be a network IP address and is
therefore ignored? Has anyone seen this before? Note that the LAN subnet
makes it so the host portion is the last 2 bytes of the address (3.0),
so it should be a valid host IP.

System setup:
Linux Redhat 9 (running 2.6.7 kernel)
Ntop ver 3.1
Libpcap ver 0.7.2

Regards,

scott
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