Cross-subnet VNC remote login failure in ZStack Cloud

Issue

Use this article to troubleshoot third-party cloud management and cross-subnet VNC issues.

Environment

• Product: ZCF
• Component: Cloud
• Affected object: console/VNC
• Versions: 4.x, 5.x
• Scenario: Third-party cloud management/cross-subnet VNC

Symptoms

• The console displays a white screen, noVNC/VNC cannot open, or cross-subnet VNC fails from a third-party platform.