Security and HTTP, FTP, and TFTP Services

Versions 2.0 and higher of the 171 CBU 98090 and the 171 CBU 98091 processors use:

  • HTTP services to provide access to its embedded Web pages.

  • FTP and TFTP services to support various features including firmware upgrades.

The HTTP, FTP, and TFTP services can be disabled or enabled using the Control Expert Security tab.

HTTP, FTP, and TFTP services are disabled by default.

You can use Control Expert to enable or disable HTTP, FTP, and TFTP services as described below.

NOTE: Schneider Electric recommends that you disable these services when you are not actively using them. Leaving these services enabled increases your system’s vulnerability to cyberattacks.

Using Control Expert to Enable and Disable Firmware Upgrade and Web Access

Perform the following steps to enable or disable FTP/TFTP or HTTP services on the module.

Step

Action

1

In the Control Expert Project Browser > Structural View, double-click the desired Ethernet network in the Communication > Networks directory to open the editor for that network.

2

Click the Security tab.

3

On the Security screen, choose the appropriate setting: (Enabled or Disabled) for the service or services.

The edits will not take effect until they are successfully downloaded from your PC to the processor.