Error while trying to connect to console of a VM machine using console on VMware V-Sphere client.

We are unable to visualize console on of our VM machine using console of VMware V-sphere client .
It throws as a error

"Unable to connect to MKS:Unable to connect to server"

Please help me to understand what's the probable cause and rectification for the issue.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Check the following:-

1. Disable any firewalls on your computer, which the vSphere client is installed.

2. Check there is no NAT, Reverse NAT, Firewall if using on a Public IP Address.

3. Can you resolve the ESXi host by IP Address and FQDN, this means can you ping the FQDN or traceroute to he FQDN on the ESXi host server?

4. Is this All VMs, of just a single VM ?

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pragulAuthor Commented:
Question asked by the experts helped me to figure out the issue with firewall port ,we worked on the same and got it fixed.
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