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2. INSTALLATION
2.5.1.
Private networks and public networks
The connection networks may be private or public.
A private network is a closed network with no connections
to the outside world and is intrinsically more secure.
The public network (Internet), in contrast, allows you to ac-
cess the devices connected to the network from anywhere
in the world but, because of this, it is less secure.
Finally, there is the option of connecting a private network
to a public network through a device called a firewall, which
keeps them isolated except for duly authorised traffic.
In this type of configuration, a private network is often iden-
tified with the acronym LAN (Local Area Network) and the
public with the acronym WAN (Wide Area Network). Other
ways to identify them are intranet and extranet.
Note that the private network can also be constituted by a
single device.
Figure 13 3 shows the different types of networks.
PRIVATE NETWORK
Technician
(PC Windows)
PUBLIC NETWORK
INTERNET
Remote service
Remote technician
Figure 13 - Types of networks
2.5.2.
Firewall
The firewall is a physical device or a software application
that isolates a device or a network section from the rest of
the connection network.
Several firewalls may need to be crossed to reach a device.
For example, there might be a firewall between the corpo-
rate LAN and the Internet and another firewall that isolates
the device from the corporate network.
To access a multi-purpose controller behind a firewall you
need to configure the access channels or firewall traffic
rules and implement connections via VPN (Virtual Private
Network) or directly through a modem.
Consult the corporate IT system administrator to properly
configure firewalls or know the parameters to implement a
VPN or connect via modem.
24
Ethernet
CAN
CAN
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R-GCANs
F-MIX
F-MIX
F-MIX
F-EU16
F-EU16
4 3
R-GCANs
F-MIX
F-MIX
F-MIX
F-EU16
Controller
Controller
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R-GCANs
F-MIX
F-MIX
Controller
In order to connect to an external multi-purpose controller
and ensure the proper operations of all the services, the
following ports need to be open (communicate the list to
the IT administrator):
20, 21
5500, 5800, 5900
2.5.3.
Router
In cases of particularly complex or extended Ethernet net-
works or that are subject to intense broadcast type traffic,
the connection to the 2850T and 3850T controllers must
be isolated. This is achieved by structuring the network
into subnets (corporate/machine), or by limiting the TCP/IP
traffic actually necessary for hubs or services.
This rule, in general, should be also be observed when
connecting 2850T and 3850T controllers in small sized
networks or with remote access systems.
The recommended solution is to connect the 2850T and
3850T controllers via a router.
The router is a layer 3 device that allows you to route the
communication packets between different networks, mean-
ing to determine specific port outputs package that arrived
based on the target IP address.
The use of router ensures that the Ethernet traffic to or from
the 2850T and 3850T controllers is filtered and remains
isolated from the rest of the corporate network or from the
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F-EU16
2.5.4.
VNC (Virtual Network Computing)
You can check the multi-purpose controller remotely using
a VNC connection with a personal computer. The RFB pro-
tocol used is public domain.
With the VNC connection, the multi-purpose controller
assumes the host function and the personal computer the
client, where the connected multi-purpose controller inter-
face is exactly reproduced.
Every action (clicking with the mouse, settings, etc.) per-
formed on the reproduction of the interface display that
CAN
appears on the personal computer is faithfully replicated on
the controller and vice versa. The pages on the display and
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F-MIX
F-EU16
F-EU16
2.5.5.
VNC Server
The VNC server is part of multi-purpose controller opera-
tions. The VNC server is disabled by default. To enable it:
1.
Log in as administrator. For more information on the
login procedure, refer to the section "4.1. Login pass-
word" on page 35.
2.
Open the Home Page by pressing the
selectService.
Select Setup
3.
4.
Select Configuration on the page that opens. Note the
device IP address that is used to configure access
through clients. If the network addresses have not yet
been set, see paragraph "4.14.2.2. Network Configu-
ration" on page 72.
5.
Select Network.
Select NTP VCN Configuration.
6.
Port
502
80703B_MHW_2850T/3850T_02-2019_ENG
Service
FTP
Modbus TCP
VNC
button and
- Quick Links:
- Login Password
Hide quick links:
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