645M-4 IPSec Server/Client setup

The following application note demonstrates the configuration of the ELPRO 645M-4 cellular modem utilizing IPSec Tunnelling.  Internet Protocol Security (IPSec) is a secure networking protocol that authenticates and encrypts data packets that are sent over the Internet.  When using a Public Cellular network, it is recommended that some form of security be used to protect the data from eavesdropping. 

Network Example - Overview 

Typical network applications that IPSec can be used for are Point to Point or Point to Multipoint applications as seen below.  This application note will cover configuration for both examples.