Product manual

NL200 Network Link Interface
TLS Proxy Forward Port Number
If the 'TLS Proxy Forward Physical Port' is set to CS I/O port, the NL200 will
open an unencrypted TCP connection with the datalogger over the CS I/O port.
If the 'TLS Proxy Forward Physical Port' is set to Ethernet port, then the
NL200 will open an unencrypted TCP connection over Ethernet on the defined
'TLS Proxy Forward IP Address.' to the datalogger.
This entry defines the port number that the NL200's TCP client will use to
communicate with the dataloggers TCP server. The datalogger's PakBus/TCP
server port must be set to communicate on this port number (default port is
6785).
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 (seconds)
This setting 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 seconds)
8. Applications
8.1 Working around Firewalls
The NL200 can be used to provide a connection between LoggerNet and a
datalogger when both are behind firewalls. The NL200 must be on a public IP
address and acts as a common meeting place for all PakBus communications.
FIGURE 8-1. Working around firewalls
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