Product manual

Appendix C. NL200 Settings
TLS Proxy Forward IP Address
Secure communications received on the NL200 TLS Server will be forwarded
on a non-secure TCP connection to this IP address. If the 'TLS Proxy Forward
Physical Port' is specified to be the CS I/O port, this setting is not set by the
user as the NL200 will obtain the IP address of the datalogger automatically. If
the 'TLS Proxy Forward Physical Port' is specified to be the Ethernet port then
the forward IP address must be specified. Enter the IP address of the destination
datalogger here.
TLS Proxy Forward Port Number
When doing TLS Proxy communications the NL200 TLS server maintains a
secure connection with a remote client. If the 'TLS Proxy Forward Physical
Port' is specified to be the CS I/O port, the NL200 will then open a TCP
connection with the logger over the CS I/O port and do unecrypted data
transfer with the logger. If the 'TLS Proxy Forward Physical Port' is specified
to be the Ethernet port then the NL200 will open the TCP connection over
Ethernet on the 'TLS Proxy Forward IP Address.'
In order to communicate with the connected datalogger's TCP server, the
NL200's TCP client application must open a socket to that server. The socket
of the datalogger's TCP server is uniquely identified by an IP address and a
port number. This entry is where the port number of the NL200's TCP client is
set. The datalogger's TCP server port must be set to communicate on this port
number.
If secure communications come in on the 'TLS Proxy Server Port Number' the
NL200 will attempt to open a TCP connection to the datalogger on the 'TLS
Proxy Forward Port Number'. Also, regardless of this setting, the NL200 TLS
Proxy Server will always listen on the secure HTTP (HTTPS) port number
443. If a secure connection is established on this port the NL200 will attempt to
communicate to the datalogger on the HTTP port 80.
Leave this setting at its default unless the datalogger is expecting
communications on a different port.
(range 1..65535)
TLS Proxy Timeout
This setting, in units of seconds, will determine how fast the proxy server/client
sessions will timeout if no activity is detected. Set to 0 for no timeout (not
recommended). (range 0..999)
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