MA-025
–
DGA 900 Operator Guide
–
Rev 2.0
12-Apr-19
Page 40 of 92
6.10.5
Communication Services
Select
Settings
>
Communication Services
to open the Communication Services page as
shown in Figure 6-38.
Note: This functionality is available only to ‘Operator’ and ‘Administrator’ users.
All configuration settings specified on this page apply to
all
interfaces (Ethernet, USB and
GSM-GPRS modem).
Figure 6-38: Communication Services
Select the relevant slider button to enable/disable the relevant communication service. E.g.
Modbus-TCP, SSH (Secure Shell) and HTTPS
—
but do not rely on the firewall settings.
To implement a custom security policy, upload a new certificate to replace the GE self-
signed certificate and enable HTTPS requests only.
A certificate can be uploaded from a USB drive. In the Upload certificate field, click the
Select file
button, select the new certificate (PEM file) and click
Open
.
Click the
‘
Save
’
button
in the application header to apply the changes and then restart
the DGA 900.
Note:
SSL certificates are small data files that digitally bind a cryptographic key to an
organization's details. When installed on a web server, it activates the padlock
and the HTTPS protocol and allows secure connections from a web server to a
browser.
Note:
If HTTPS is disabled, the certificate will be applied when HTTPS is enabled.
Note:
The HMI has no automatic redirection between HTTP and HTTPS (or vice versa).
This results in the following browser message
“Si
te cannot be reached over
HTTP”.
