FireBrick FB6602, Руководство пользователя

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Configuration
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Figure 3.8. Navigation controls
Caution
The configuration pages are generated on-the-fly using JavaScript within your web browser
environment (i.e. client-side scripting). As such, the browser is essentially unaware of changes to
page content, and cannot track these changes - this means the browser's navigation buttons (Back,
Forward), will not correctly navigate through a series of configuration pages.
Please take care not to use the browser's Back button whilst working through configuration pages -
navigation between such pages must be done via the buttons provided on the page - "Prev", "Next"
and "Up".
Navigating away from an object using the supported navigation controls doesn't cause any modifications to
that object to be lost, even if the configuration has not yet been saved back to the FB6000. All changes are
initially held in-memory (in the web browser itself), and are committed back to the FireBrick only when you
press the Save button.
The navigation button area, shown in Figure 3.8, also includes three other buttons :-
• New : creates a new instance of the object type being edited - the new object is inserted after the current one ;
this is equivalent to using the "Add" link one level up in the hierarchy
• Erase : deletes the object being edited - note that the object will not actually be erased until the configuration
is saved
• Help : browses to the online reference material (as desribed in Section 3.2.1) for the object type being edited
Caution
If you Add a new object, but don't fill in any parameter values, the object will remain in existence
should you navigate away. You should be careful that you don't inadvertently add incompletely setup
objects this way, as they may affect operation of the FireBrick, possibly with a detrimental effect.
If you have added an object, perhaps for the purposes of looking at what attributes can be set on it,
remember to delete the object before you navigate away -- the "Erase" button (see Figure 3.8) is used
to delete the object you are viewing.
3.4.4. Backing up / restoring the configuration
To back up / save or restore the configuration, start by clicking on the "Config" main-menu item. This will
show a page with a form to upload a configuration file (in XML) to the FB6000 - also on the page is a link
"Download/save config" that will download the current configuration in XML format.
3.5. Configuration using XML
3.5.1. Introduction to XML
An XML file is a text file (i.e. contains human-readable characters only) with formally defined structure and
content. An XML file starts with the line :-