Campbell NL200, User Manual

Page: 28 / 64

NL200/201 Network Link Interface
18
Figure 7-3. Serial server LoggerNet setup
7.3.4 Connect
You are now ready to connect to your datalogger using the LoggerNet Connect
Screen.
7.3.5 Serial Sensors
The NL200/201 configured as an RS-232 serial server as described above can be
used to communicate with a serial sensor. However, LoggerNet is not capable of
communicating with the serial sensor. You must have some other method of
communicating with the sensor.
7.4 TLS
The NL200/201 supports transport layer security (TLS) for proxy functions
including HTTPS. TLS versions 1.0 and 1.1. are supported. The TLS
implementation supports symmetric algorithms AES-256, AES-128, and RC4 and
RSA keys up to 4096 bits. For any TLS connection, the unit will preferentially
use AES-256, then AES-128, and finally RC4. X.509 certificates are supported,
with the exception of v3 extensions. Certificates should be PEM format. Up to 10
certificates can be chained. 20 KB of space is provided for certificate storage. The
Private Key should also be in PEM format and, if encrypted, use AES-256 or
AES-128 (SHA).
The implementation of TLS in the NL200/201 is provided so that secure,
encrypted communications can be established between a TLS client and the
NL200/201. With the TLS Proxy Server enabled, the NL200/201 can act as a TLS