Under certain rare conditions, you may lose connectivity to your managed Linux or Windows workload VMs. Try the following steps:
From your Public Cloud (AWS or Microsoft Azure)
Ensure that all ports on the VM, including those managed by NSX Cloud, the OS firewall (Microsoft Windows or IPTables), and NSX-T Data Center are properly configured in order to allow traffic,
For example, to allow ping to a VM, the following needs to be properly configured:
Attempt resolving the issue by logging in to the VM using SSH or other methods, for example, the Serial Console in Microsoft Azure.
You can reboot the locked out VM.
If you still cannot access the VM, then attach a secondary NIC to the workload VM from which to access that workload VM.