You haven't mentioned the version of ESXi/VC you are running.
You need to be aware of this though:
Caution: VMware recommends that you do not disable the Web Access login page on ESXi 5.0 as it will break vSphere HA and log collections. For more information, see Cannot configure HA after disabling the Host Welcome login page on an ESXi host (2009546). Note: ESX/ESXi 4.x hosts are also affected when they are managed by vCenter Server 5.0.