Campbell Scientific NL200/NL201 Network Link Interface User Manual

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NL200/201 Network Link Interface

datalogger and forward the unencrypted data. In HTTPS communications,

web browsers use port 443. The NL200/201 will always listen on port 443

regardless of the value of this setting. Therefore, if HTTPS

communications are desired, it is unnecessary to configure this setting.

•

Set the

TLS Proxy Forward Physical Port to CS I/O Port for

Configuration A or to

Ethernet Port for Configuration B.

•

For Configuration A, leave the

TLS Proxy Forward IP Address set to

0.0.0.0. For Configuration B, enter the datalogger’s IP address in the

TLS

Proxy Forward IP Address setting. This address must be configured in

the datalogger. It must be a unique, static IP address on the same subnet as

the NL200/201 IP address. For example, if the NL200/201 IP address is

192.168.5.1 with subnet 255.255.255.0, a valid IP address for the

datalogger would be 192.168.5.2 provided there are no other devices on

the subnet with that address.

•

Set the

TLS Proxy Forward Port Number. This is the TCP port number

that the proxy server will use when it opens a TCP connection to the

datalogger to forward unencrypted data. The datalogger’s TCP server port

must be set to communicate on this port number. The default value for the

datalogger’s PakBus/TCP server is 6785, so this setting can likely be left

at the default. The datalogger listens for HTTP traffic on port 80. The

NL200/201 will always forward TLS traffic received on port 443(HTTPS)

to port 80(HTTP) regardless of this setting. Therefore, if HTTPS

communications are desired, it is unnecessary to configure this setting.

•

It is recommended to leave the

TLS Proxy Timeout set to 90 seconds

although it can be changed if desired. This will determine how fast the

NL200/201 proxy server and client connections will timeout if no activity

is detected.

To configure the datalogger for Configuration A, connect to the datalogger

using DevConfig and select the CS I/O IP tab. Set the

CS I/O Interface IP

Address to a static IP address. Use the datalogger’s CS I/O Interface that

corresponds to the NL200/NL201’s

CS I/O IP Interface Identifier setting.

To configure the datalogger for Configuration B, connect to the datalogger

using DevConfig and select the TCP/IP tab. Set the

Ethernet Interface IP

Address to a static IP address.

For either configuration, the IP address must not be 0.0.0.0, and it must be

unique on the same subnet as the NL200/201 IP address. For example, if the

NL200/201 IP address is 192.168.5.1 and Subnet Mask is 255.255.255.0, the

datalogger address could be set as 192.168.5.2 provided there are no other

devices on the subnet with that address. Also set the datalogger’s Subnet Mask

to match that of the NL200/201.

The datalogger must be listening on the same TCP port that the NL200/201 is

configured to forward TCP traffic on (NL200/201 setting: TLS Proxy Forward

Port Number). The datalogger always listens on port 80 for HTTP, therefore,

no TCP port configuration is necessary for using HTTP.