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Chapter 3 Technical Information
12
Warning: Subfolder license must remain in the same folder as the program files (i.e.
where was Kerio Network Monitor originally installed)!
After changing the folder and possible copying the measured data you can again run
Network Monitor Daemon.
3.3 Technical Limitations
The principle how Kerio Network Monitor works implies some small limitations. They
are to be kept in mind especially when choosing the computer for installation of Kerio
Network Monitor
Network Components and Network Topology
If your network contains switch (switching hub), keep in mind that it does not send all
the data to all its ports! But Kerio Network Monitor requires all the data to be present in
the segment, which is “his”computer connected to.
There are several solutions:
• install Kerio Network Monitor directly on the computer, which is connected to the
Internet. This solution is recommended always when on the internet gateway runs
Windows type operating system. (Kerio Network Monitor then must be set up for
monitoring on the “inner” network adapters — see chapter 6.1).
• some types of switches can be configured so that they send all data to one (so called
monitoring) port. The station, which Kerio Network Monitor Daemon runs on, can be
connected to this port.
• insert small hub between the switch and the internet gateway (3 ports are enough —
one for the switch, the second for the internet gateway and the third to the computer,
where Kerio Network Monitor Daemon runs).
If the network is divided by the router to more IP segments Kerio Network Monitor Dae-
mon must be installed on computer in the same segment as the internet gateway.
If the network has more segments and each of them is connected directly to the internet
gateway Kerio Network Monitor must be installed directly on the gateway. In the other
case it will monitor only the data in the segment which it is connected to.
E-mail
The natural requirement of the network administrator is also to monitor the volume of
the data transferred via electronic mail (E-mail) and accepted by the local mail server.