PLANET WSG-404 - Manual (Page 62)

WSG-404 User Guide 62
Click Start Internet Access to begin to use the Internet.
MD5 Hash: If transaction responses need to be encrypted by the Payment Gateway,
enter and confirm a MD5 Hash Value and select a reactive mode. The MD5 Hash
security feature enables merchants to verify that the results of a transaction, or
transaction response, received by their server were actually sent from the Payment
Gateway.