I was using vSphere Client to connect my ESXi 6 server, but can't attach to any virtual machine console via Internet.

vSphere Client has error message:

Unable to connect to the MKS: Login(username/password) incorrect

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Can telnet the ESXi 443 and 902 port.


As far as I remember, solved this issue by allowing few ports by host firewall (902, 903, 443). Make sure it isn't blocked on both sides.

Also, there are some options here https://communities.vmware.com/thread/238478

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As of version 6 web UI is the only fully compatible client for ESXi. Try connect via browser:

where is your host IP-address.

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  • 1
    But I can use vSphere Client before, and I need to using VMware Workstation to mount some USB drivers to virtual machine, so I must using the client – Bobylive Jul 17 '17 at 7:30

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