ST-72 User's Manual
Document: UM-1007
Revision Level A
131
be set to allow a range or single IP Address. Some firewalls can restrict access by MAC
address. This can be used instead of or in addition to the source IP address. The
protocols for forwarding rules should be TCP/IP. The destination ports should be 80 for
access to the web server, and 502 for access to ModbusTCP.
In most cases, a router and firewall will separate the network from the internet. It is not
recommended to forward ports from the internet to an ST-72. In cases where offsite
access is needed, a VPN or tunnel connection could be used to get inside the network.
10.4
STATIC IP CONFIGURATION
If you are setting up static IPs on a larger company network, make sure to consult your
IT administrator to obtain an IP address. The IT administrator can also provide the
correct netmask, and gateway. In this case, do not choose your own addresses or you
could cause an address conflict with other devices on the network.
10.4.1
ST-72 STATIC IP CONFIGURATIION
On the ST-72, in the network settings menu, disable DHCP. The IP address should be set
to 192.168.0.x where ‘x’ is any number from 0-255. A typical address would be
192.168.0.2. The netmask should be set to 255.255.255.0. The gateway can be left as
0.0.0.0 unless the ST-72 will be accessing ModbusTCP devices outside a router/firewall.
If the ST-72 needs to poll outside devices, the gateway IP should be set. This is typically
the IP address of a router.
Hostname
Address
Netmask
Gateway
DHCP Enabled
Unit-72-1000
192.168.0.2
255.255.255.0
0.0.0.0
No
Network Settings
Figure 10-5
10.4.2
WINDOWS XP STATIC IP CONFIGURATION
These steps are similar but not exactly the same in other versions of windows.
To connect a PC to a ST-72 using static IP configuration, the PC must also be configured.
First, access the PC’s network adapter settings. In windows XP, this can be found in the
!
After making changes to the network settings menu a power cycle is required.
Make sure to exit the menu before cycling power so that the changes are saved.
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