As you can see your error is
2013-05-28T13:23:55.328+01:00 [00808 warning 'Default'] [,0] [NFC ERROR] NfcNewAuthdConnectionEx: Failed to connect to peer. Error: Failed to connect to server *******:902
You must check for firewalls, ipsec and any other tools that can prevent connection, also double check for ports required for connection like 902. Try to telnet your ESX at port 902 to verify.
An idea: could you remove (temporary) the machine from DMZ? The routers often disallows access from the DMZ to internal zones...
HTH