The following error occurred with vSphere5.5 connection ESXI5.5 on Windows Server 2003 today:
VSphere CLient cannot connect to "192.168.1.1".
An unknown connection error has occurred. (The client cannot send the full request to the server.) (The underlying connection is Closed:an unexpected errror occurred on a send))
This error is queried because some SSL passwords are not supported on Windows XP and Windows Server 2003.
The solution is as follows:
For Windows Server 2003 or 64-bit Windows XP, you can install the following patches.
32-bit:
Http://hotfixv4.microsoft.com/Windows%20Server%202003/sp3/Fix192447/3790/free/351382_CHS_i386_zip.exe
64-bit:
Http://hotfixv4.microsoft.com/Windows%20Server%202003/sp3/Fix192447/3790/free/351401_CHS_x64_zip.exe
There are no hot fixes for Windows XP (32-bit), so just give up on it or change the system connection.
This article is from the "Thundermeng" blog, make sure to keep this source http://thundermeng.blog.51cto.com/9414441/1612925
Workaround for Windows Server 2003 using vSphere5.5 connection ESXI5.5 "Client cannot send full request to server"