After an upgrade from ESXi4.0 to ESXi5.0 you are unable to putty your hosts. What could have caused this?
The SH port in ESXi 5.0 has changed to 443 for added security.
SSH is not available with ESXi5.0, it is only available with ESX5.0
SSH is always disabled after an upgrade or clean installation.
SSH configuration is not migrated for ESX 4.x hosts or ESXi 4.0 hosts. For these hosts, SSH access is disabled during the upgrade or migration process.