The vSphere Client get error: vSphere Client could not connect to "esxi4_01" An unknown connection error ocurred. (The request failed because the remote server took long to respond. (The operation has timed outr))

Hello everyone,

     I have 08 servers running ESXi 4.1 standalone in my datacenter. A few days ago when trying to connect one of these servers via vShpere Client got the error:

  vSphere Client Could Not connect to "esxi4_01" An unknown error ocurred connection. (The request failed because the remote server took long to respond. (The operation has timed out))

The curiously I can connect to another server using the same ESXi vSphere Client.

There is no firewall rule set to lock the ESXi servers, which causes more questions. I searched some forums for solutions and found.

SSH connections work without problems, but I can not access the server via https (https://esx4_01)

I ask you to help solve this problem.

Thank you very much.