Had this strange little incident today where three new vmware esxi 4.1 hosts suddenly would not let me see the console for any of the virtual machines from my vSphere client.
I would always get the following error:
"Unable to connect to the MKS: Failed to connect to server myesx.domain.intern:902."
Turns out that the DNS-records in Active Directory were messed up so instead of pointing to the management network interface of my esxi-servers, they were pointing to some dhcp-addresses. It could have happened after fiddling around a bit when setting up a new management network. I presume esxi isn't able to renew ddns registrations (I am after all using static addresses on the management network interface). Anyway a simple static registration of the servers in DNS took care of the problem instantly.
