Administration of the unit and the web pages.

Backup/restore settings - By saving the settings to a file on your computer you will have a good backup. Should you loose your settings you can later restore from that file.
Backup to file - Save most settings to your PC.
Restore from file - Get settings from a file, previously stored with "Backup to file". You will need to save permanently and reboot the unit to use the newly restored settings.

Debug info - (Visible only if there is stored away information.) If the unit encounters any error, debug information about the error is collected automatically.
Save to file - exports stored debug information to a file on your PC.
NOTE: You must wait 20 seconds after clicking Save to file before the "Save to file" window opens. Exporting the debug information is a slow process. Do not do anything during that time. Only after you have saved the file to your PC may you refresh the page and continue working.

Read more online:
Debug info

Passwords and User Access Rights (Access Control List) (only for the admin user) - List of users allowed to log in to these configuration pages.
Apart from the admin user that has unlimited access to all configuration pages, additional users can be definied and their access can be limited.
User, Password - The username and password to be used to gain access to the configuration webpages. Both username and password MUST be at least 4 characters long for a valid entry. Username admin cannot be changed - only its password. Only the admin user is allowed to login to the telnet CLI.
Deny Pages / Allow Pages - List of configuration pages the user is NOT allowed to access. Multiple pages can be specified, comma-separated. The page names are as in the page URL, without the .html ending. For example "if,adsl,admin" prohibits the user from visiting the configuration pages if.html (Network config), adsl.html (ADSL config), and admin.html (the Administration page).
  Subpages: Specifying "if:wan" the user is allowed to see the Network config page, but is only able to edit the LAN interfaces. "profile:Hi", "profile:Lo" and "profile:AC" prohibits the user to edit those security profiles, but is allowed to edit others. "netstat:ava" hides the advanced Network Status page (but user can still view the normal Network Status page).
  allow: by preceding the list with "allow:" you can instead specify the list of configuration pages the user IS allowed to access. For example "allow:if,adsl,admin" allows the user to access only those configuration pages, but no other.

Password (non-admin users) - Change your username's password.
The admin user can add and delete additional authorized users, and change their passwords and clearances.
The additional users themselves can only change their own password.

Time - Select the correct time zone you are in.
Either specify URL or IP address of an SNTP server you want to use, or leave the field empty and let the unit pick a random server for you.

Front Panel Buttons - Controls behaviour of the buttons on the unit's front panel.

ALT button
Outside access - When checked, a long push on ALT button on unit bypasses normal password and firewall routines. To temporarily enable support staff to visit these web pages.
Security profile - Only the security profiles enabled here are selectable using the front panel ALT button. (All profiles are however still selectable using the web interface and the scheduler.) E.g. disabling "AC" and "blo" makes ALT button presses only cycle between "Hi" and "Lo".
All four profiles disabled disables the possibility to change security profile using the ALT button altogether.

SEL button
Wireless on/off - When checked, a very long (10 seconds) push on SEL button enables or disables the unit's Wireless connection.

SNMP
Certain configuration parameters can be monitored and/or edited by an SNMP server accessing this unit.

Read-only access - parameters can only be read but not edited.
Read-write access - parameters can both be read and edited.
Community - the SNMP community of the connection. Community must be set to same password on both SNMP server and this unit.
IP address - if specified only SNMP requests from that address are accepted. If left empty all SNMP requests, regardless of what SNMP server they originate from, are accepted and answered.

NOTE! In order to use SNMP you also must open up the firewall of this unit, to allow reception of SNMP requests. Go to the currently active security profile page and enable either "Remote configuration (SNMP)" for remote WAN access, or "Administration (SNMP)" for local LAN access.

General Settings
Settings as for operator - Preconfigured settings suitable for listed operators. Select name of your Internet Service Provider and click Go to reconfigure your unit.

Read more online:
Administration

Device Information
The Device Information page lists information about your unit, its hardware, firmware and licences.

License information - Some features of your unit requires a license to be able to be used. Here you see a list of licences installed on your unit.
Buy Extras - You can purchase licences online using a credit card to get instant access to features currently locked in your unit.

Hardware - A list of hardware components and features mounted inside your unit.
Locked. Upgradeable - Some hardware in your unit might be mounted but require purchase of a licence to work. Click on "Buy" to purchase licence online to get instant access to the hardware.
If there is no "Buy" link then all hardware in your unit is unlocked and ready to be used.