For more information about this gateway, please refer to https://secure.netbilling.com/public/docs/merchant/public/directmode/directmode3protocol.html

To add an NetBilling gateway, use the following settings:

{
  "account_id": "(required) This is the number of your merchant or agent account, as a 12 digit string. Required for all transactions",
  "dynip_sec_code": "(optional)  This field should be used only when a Direct Mode client is unable to connect to the server from a Trusted Static IP Address and must connect from a dynamic or unknown IP Address",
  "environment_mode": "Live(0) or Sandbox(2) environment mode at NETbilling API (required)"
}

Gateway Specific Fields

"gatewaySpecificFields":{
    "net_billing":{
          "member_duration": "value",
          "member_username": "value",
          "member_password": "value",
          "recurring_amount": "value",
          "recurring_period": "value",
          "processor": "value",
          "site_tag": "value"   
    }
}