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VMware Remote Console (VMRC) requires that SSL is enabled on hosts (2007386)

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Details

When you use VMware Remote Console to connect to a virtual machine that runs on a host with SSL disabled, you see the following error:

 Unable to connect to the MKS: SSL required .

Solution

SSL authentication is enabled on ESX/ESXi hosts by default.
If disabled SSL on a host, you must enable it again before you can use VMware Remote Console (VMRC) to access a virtual machine.

To enable SSL from the vSphere Web Client:
  1. Open the vSphere Web Client and select the host in the inventory.
  2. Click the Settings tab, and select Advanced System Settings under System
  3. Search for SSL, select the Config.Defaults.security.host.ruissl setting and click the Edit icon. 
To enable SSL authentication from vSphere Client:
  1. Directly connect to the host  using the vSphere Client.
  2. Click the Configuration tab.
  3. Under Software, click Advanced Settings.
  4. Expand Config > Defaults.
  5. Expand Security and select host.
  6. Select the option to enable SSL authentication.
To enable SSL authentication using Tech Support Mode or the ESXi Shell:
  1. Connect directly to the host as a user with root privileges. The ESXi 5.0 host can be accessed using Tech Support Mode (TSM). ESXi 5.1 and later include the ESXi shell.  
  2. Open the /etc/vmware/config file using a text editor.
  3. Locate the security.host.ruissl  entry.
  4. Change the value of security.host.ruissl  from FALSE  to TRUE.

    If it is set to no, change it to yes .

Note: If the security.host.ruissl entry is not available in the /etc/vmware/config file, add the entry and set it to appropriate value.

Additional Information

For translated versions of this article, see:

Update History

04/25/2013 - Added procedure to enable SSL authentication from GUI 03/06/2015 - Added procedure to enable SSL authentication from Web Client. Added additional versions. Some terminology cleanup (TSM is ESXi Shell in later versions of ESXi).

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