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VIRTUALISATION Linux finds a role in Australian prison cells
VIRTUALISATION Linux finds a role in Australian prison cells | Linux finds a role in Australian prison cells |
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| by Stephen Withers | |
| Friday, 29 May 2009 | |
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The Ubuntu Linux based system runs on individual PCs (using Atom CPUs as they are the fastest available that don't require cooling fans), but the environment is locked down and all storage is centralised. This ensures a 'clean' operating environment on each login, even in the relatively unlikely event of malware reaching the system during a previous session. Individual computers are assigned to 'realms', and this determines which applications are made available. For example, the 'cells' realm might only provide access to applications such as a word processor and spreadsheet along with content of a religious nature, while games might only be available in the 'recreation room' realm. All user sessions are logged, and printed output is marked with the identity of the prisoner concerned, who can also be charged for the job. User files are stored on the server, and are accessible only by the individual prisoner and authorised custodial staff. Other controls can prevent the use of modems (a 3G 'stick' modem is small enough to be smuggled into a prison relatively easily), USB storage devices or removable media. Talking of contraband, PrisonPCs are housed in transparent cases for easy inspection. According to Cybersource, this - along with centralised storage - turns a four-hour task into a four-second look over. Web access is restricted to white and grey-lists. Greylisted pages are automatically monitored, and if any changes occur they are removed from the list until re-approved by correctional staff. All incoming and outgoing emails are filtered, quarantined and archived, with a particular goal of preventing communication with victims. PrisonPC allows the relaying of approved Internet radio streams. The Alexander Maconochie Centre is using the video streaming capability to provide educational and religious programs on demand, but not the ability distribute free to air or cable TV to cells, with optional time-shifting. What other features are offered, and where else is PrisonPC being used? Find out on page 2. |
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