Remote Access to the DomU
The story on normal access for VPS users is deceptively simple: The Xen VM is exactly like a normal machine at the colocation facility. They can SSH into it (or, if you're providing Windows, rdesktop). However, when problems come up, the user is going to need some way of accessing the machine at a lower level, as if they were sitting at their VPS's console.
For that, we provide a console server that they can SSH into. The easiest thing to do is to use the dom0 as their console server and sharply limit their accounts.
Note
Analogously, we feel that any colocated machine should have a serial console attached to it.[43] We discuss our reasoning and the specifics of using Xen with a serial console in Chapter 14.
An Emulated Serial ...
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