Campbell Scientific NL200/NL201 Network Link Interface - Manual (Page 31)

NL200/201 Network Link Interface
The settings found in the TLS Proxy Server and TLS tab in DevConfig are used
to configure the NL200/201 TLS Proxy Server.
Two physical configurations are possible and the required settings differ
depending on the configuration chosen. The possible configurations are shown
in the following figure.
FIGURE 7-4. TLS proxy server configurations
Configuration A
In Configuration A, the NL200/201 decrypts TLS traffic and forwards the
unencrypted TCP traffic to the datalogger over the CS I/O port. The
NL200/201 is able to “learn” the IP address of the attached datalogger and will
open a TCP connection on the “learned” IP address.
Configuration B
In Configuration B, the NL200/201 decrypts TLS traffic and forwards the
unencrypted TCP traffic to the datalogger back out on the Ethernet port. The
user must specify an IP address and TCP port number for the forwarding TCP
connection.
To configure the NL200/201 TLS Proxy Server to communicate with a
datalogger attached to the CS I/O port or with a datalogger over an Ethernet
connection, open DevConfig and configure the following settings.
Settings Editor | TLS Proxy Server Tab
• Set the TLS Proxy Server setting to enable.
• Set the TLS Proxy Server Port Number. This is the TCP port number
on which the proxy server will listen for incoming connections. The TLS
Client also needs to be set to communicate on this port number. When
TLS communications are received on this port number, the NL200/201
will decrypt the data and attempt to open a TCP connection to the
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