Technical Reference Manual - InduSoft

About thin clients and mobile access
Method 4: Encrypted Communications (SSL)
By enabling the Web Tunneling Gateway (WTG), you can enable all communications between the Data Server
+ Web Server and the Thin Client to be encrypted using RC6, a highly-secure 128-bit encryption standard. To
use SSL, you must do the following:
1. Click Advanced in the project settings (Thin Client on the Project tab of the ribbon). Select (check) the Web
Tunneling Gateway Enabled option. Click on the SSL radio button and be sure the SSL port is set to 443. Click
OK.
Project Settings — Web — Advanced dialog
2. In your Web Server, be sure SSL capabilities are enabled and that a SSL Certificate of Authentication is
present.
3. Be sure SSL is enabled in the Web Client
4. Set up all other Web configurations to support the WTG.
Method 5: VPN
A VPN is a Virtual Private Network. It is called virtual since it really uses the public Internet to transport
data from one computer to another. But since this network is encrypted and uses other security mechanisms
enabled by the ISP, is it a very secure Private Network. While VPN's are inherently secure, they are more
costly that a simple public Internet connection.
Port Usage
There are various ports that are used by IWS and/or related software. These are:
Port #
Program
20 FTP Server (Data)
21 FTP Server (Command)
25 SMTP Server
80 Microsoft IIS Server for HTTP packets
110 POP3
118 Microsoft SQL Server Services
161 SNMP
162 SNMP Trap
389 LDAP
443 Microsoft IIS Server for HTTPS packets (SSL)
502 Modbus TCP/IP protocol
663 LDAP over SSL
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