Issue
After a Schneider Electric domain policy update, some engineer laptops experience issues where the Sigma client fails to connect to the server, despite previously functioning correctly. No error message or HTTP error is displayed.
Product Line
Satchwell BAS & Sigma
Environment
- Satchwell Sigma
- Scheider Electric Computer
Cause
The issue has been linked to firewall updates pushed via Schneider Electric's domain policies. These updates include changes to the Trellix firewall (formerly McAfee), which may block Sigma from launching or connecting properly.
Resolution
Access to firewall settings is typically restricted on Schneider Electric engineer laptops. However, a temporary workaround is available:
- Locate the Trellix icon in the taskbar near the system clock.
- Right-click the icon and select Quick Settings.
- Choose Enable Firewall Timed Groups.
- Enter a reason when prompted.
- This will disable the firewall for one hour, allowing Sigma to launch and connect successfully.
