We are running several RHEL 6 64-bit VM's in a vBlock infrastructure using vCenter 5.5. If I open a console session through the vSphere web client the ctrl+c keystroke will not work. This is very inconvenient as a simple ping is now unstoppable. If I access the same VM through the vSphere desktop client or SSH session, ctrl+c works as expected. The VM's have the VMware tools installed.
You can switch to another console, log in to a new session, and then kill the ping process running in the first console.
To switch consoles, just press Alt while pressing the left or right arrow keys. This take me through 6 different consoles.
This is a VMware and a browser issue.