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Sunday, July 20, 2008

How Linux VPS Provides a Privacy and Protection

Linux VPS provides a private and protected area that operates as an independent server. Linux VPS behaves as if it is, in fact, a stand-alone physical server offering excellent security, performance, and flexibility.

Operating system-level server virtualization creates isolated, secure virtual environments on a single physical server. Server virtualization enables better server utilization and ensures applications do not conflict. Each account performs and executes as a stand-alone server can. Reboot your Linux VPS account independently and have and assign account root access, users, IP addresses, memory, processes, files, applications, system libraries and configuration files.

Your Linux VPS behaves as a stand-alone Linux server. It has standard startup scripts and software from multiple vendors can operate in the account without modification. Change any configuration file and install additional software. The file system, the processes, Interprocess Communication (IPC) mechanisms, and sysct1 variables are always fully isolated from any other account. Processes which belong to your account are scheduled for execution on all available processing power.

Your Linux VPS includes its own IP address (or its own set of IP addresses). The network traffic of your account is isolated from all other accounts. Traffic snooping is not possible. Manipulate your accounts routing table using advanced routing features.

Resource management controls the amount of resources available to your account. This enables the quality of service to meet the service level agreements associated with your account. The operating system-level server virtualization also provides performance and resource isolation which protects your account from denial of service attacks.

The isolated environment of the Linux VPS is established by creating a server sandbox. Each Linux VPS has its own complete directory structure, a virtual file system, its own set of independent applications (Web server, mail server.); a security policy that limits one Linux VPS from interfering with, or even seeing, another Linux VPS; and advanced resource management, which controls how system resources are shared among Linux VPS accounts.

Functional Isolation -- Each Linux VPS (and the applications that run on it) are configured independently. Customers have full administrative control, including the ability to install, customize, and run almost any custom or off-the-shelf application. Additionally, customers have complete control of their Linux VPS configuration and settings.
Fault Isolation -- Similar to separate physical servers, a fault in one application running within a Linux VPS account does not affect any applications running on other Linux VPS accounts on the same physical server.
Performance Isolation -- FairShare technology manages how each Linux VPS uses system resources like Central Processing Unit (CPU), memory, and network, which protects each Linux VPS from the misbehavior of others on the same server.

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