Appendix A Useful Features; Appendix A.1. Ssl/Tls For Secure Connection; Appendix A.1.1. Configuring Fieldserver As A Ssl/Tls Server; Appendix A.1.1.1. Simple Secure Server Configuration - SMC Networks FieldServer FS-QS-2X10 Quickserver Start-Up Manual

Appendix A Useful Features

Appendix A.1. SSL/TLS for Secure Connection

SSL/TLS (Secure Sockets Layer/Transport Layer Security) is a security technology for establishing an
encrypted connection between a server and a client. This allows the secure transfer of data across
untrusted networks.

Appendix A.1.1. Configuring FieldServer as a SSL/TLS Server

The following example sets the FieldServer to accept a secure Modbus/TCP connection on port 1502.

Appendix A.1.1.1. Simple Secure Server Configuration

Add TLS_Port parameter in the connections section of the configuration file and set to a port number
between 1 – 65535.
Connections
Adapter , Protocol
N1 , Modbus/TCP
This configuration sets the FieldServer to accept any incoming connection but will not request a client's
certificate for verification. This means that the FieldServer end point communication will be encrypted but
not authenticated.
The FieldServer will send an embedded self-signed certificate if one is requested by a connecting client.
NOTE: If a remote client requires a certificate, then request the smc_cert.pem certificate from
Sierra Monitor Technical Support and update the remote client's authority as per vendor
instructions.
, TLS_Port
, 1502
Page 20 of 34
QuickServer Start-Up Guide