NL200/201 Network Link Interface
20
HTTPS or other user-supplied TLS client. Any other client program that encrypts
a standard TCP connection using TLS may be used to establish a connection with
the NL200/201 TLS Proxy Server and the NL200/201 will forward unencrypted
TCP data to a datalogger. In this way, a remote TLS client can establish a TLS
connection with a datalogger.
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
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