Fail to connecting ESXI Server by using OpenSSL

How to connect to ESXI Server by using OpenSSL ?

ERROR information:

root ~#openssl s_client -connect 10.65.60.66:443

CONNECTED(00000003)

depth=0 /C=US/ST=California/L=Palo Alto/O=VMware, Inc/OU=VMware ESX Server Defau                 lt Certificate/emailAddress=ssl-certificates@vmware.com/CN=localhost.localdomain                 /unstructuredName=1361458780,564d7761726520496e632e

verify error:num=20:unable to get local issuer certificate

verify return:1

depth=0 /C=US/ST=California/L=Palo Alto/O=VMware, Inc/OU=VMware ESX Server Defau                 lt Certificate/emailAddress=ssl-certificates@vmware.com/CN=localhost.localdomain                 /unstructuredName=1361458780,564d7761726520496e632e

verify error:num=27:certificate not trusted

verify return:1

depth=0 /C=US/ST=California/L=Palo Alto/O=VMware, Inc/OU=VMware ESX Server Defau                 lt Certificate/emailAddress=ssl-certificates@vmware.com/CN=localhost.localdomain                 /unstructuredName=1361458780,564d7761726520496e632e

verify error:num=21:unable to verify the first certificate

verify return:1

THANKS FOR YOUR ATTENTION!!!