Internet Connection Firewall

NOTE: The Connect button changes to the Disconnect button.

3. Follow the instructions on the screen to manage the network connection with the utility.

The Internet Connection Firewall provides basic protection from unauthorized access to the computer while the computer is connected to the Internet. The firewall is automatically enabled when you run the Network Setup Wizard. When the firewall is enabled for a network connection, the firewall icon appears with a red background in the Network Connections section of the Control Panel.

Note that enabling the Internet Connection Firewall does not reduce the need for virus-checking software.

For more information, see the Help and Support Center for the Microsoft® Windows® XP operating system. To access the Help and Support Center, see Windows Help and Support Center.

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D520 specifications

The Dell D520 is a robust and reliable laptop that was introduced as part of Dell's Latitude series, catering primarily to business professionals and enterprises. Known for its solid build and practical features, the D520 emphasizes productivity and durability in a mobile computing environment.

One of the standout features of the Dell D520 is its comfortable keyboard layout. The full-sized, spill-resistant keyboard offers a tactile feel, making it ideal for extended typing sessions. Additionally, the touchpad is responsive, enhancing ease of navigation while on the go. The laptop's design prioritizes ease of use, ensuring that users can work efficiently, whether in an office or while traveling.

In terms of hardware, the Dell D520 typically features Intel processors, which provide a balanced mix of performance and power efficiency. This enables users to run multiple applications without significant lag, making it suitable for multitasking. The laptop is also equipped with a decent amount of RAM, ensuring smooth performance for standard business applications and tasks.

The D520 includes various connectivity options, crucial for modern-day professionals. It typically comes with several USB ports, an Ethernet port, and a VGA port for connecting to external displays. There is also the option for Wi-Fi connectivity, allowing users to connect to networks effortlessly.

One of the key characteristics of the Dell D520 is its durability. The laptop is designed to withstand the rigors of daily use and features a sturdy chassis that can handle rough treatment. This durability makes it a favorite among users who need a reliable machine that can endure a busy workday.

The D520 also emphasizes security features that are essential for business users. It includes options for fingerprint readers and smart card readers, allowing users to enhance data protection. This level of security is particularly valuable for professionals handling sensitive information.

Battery life is another important aspect of the Dell D520. With an efficient power management system, users can expect a reasonable battery performance that allows for extended work sessions without needing to recharge frequently.

Overall, the Dell D520 combines practicality, durability, and efficiency, making it an excellent choice for business professionals who require a reliable laptop for everyday tasks. Its balance of features and performance continues to make it a suitable option for users who prioritize functionality and dependability in their computing devices.

Contents

Abbreviations and Acronyms Dell Latitude D520 Users Guide Front View About Your ComputerDevice status lights Keyboard status lights Left View Audio connectors Right View USB connectorsBack View Serial connector Modem connector RJ-11Network connector RJ-45 Video TV-out connector Bottom View Back to Contents Appendix Cleaning Your Computer FCC Notice U.S. Only Macrovision Product NoticeFCC Class B Dell QuickSet Battery Meter Using a BatteryBattery Performance Checking the Battery Charge Power Management Modes Conserving Battery Power Click Start→ Shut Down→ Stand by Configuring Power Management SettingsCharging the Battery Hibernate Mode Storing a Battery Replacing the Battery Card Blanks Using CardsInstalling a PC Card or ExpressCard Card Types ExpressCard Removing a Card or Blank Setting Display Resolution and Refresh Rate Using the DisplayAdjusting Brightness Switching the Video Image Swapping Primary and Secondary Displays Click Settings in the Display Properties window Find It Here Finding Information Dell Support Website support.dell.com GuidesSelect Drivers & Downloads and click Go Windows Help and Support Center Glossary Docking device See APR Device driver See driverPage Page NIC See network adapter Page System tray See notification area Video resolution See resolution Back to Contents Ftp.dell.com Online ServicesGetting Help Obtaining Assistance Support Service Problems With Your OrderAutoTech Service Automated Order-Status Service Antigua and Barbuda Diagnostics ChecklistBefore You Call Contacting Dell 0011 Argentina Buenos AiresAruba Australia Sydney Cayman Islands Canada North YorkOntario 011 Ecuador Denmark CopenhagenDominica Dominican Republic Hong Kong GrenadaGuatemala Guyana Korea Seoul JamaicaWebsite support.jp.dell.com Japan Kawasaki Netherlands Amsterdam MexicoMontserrat Netherlands Antilles Grenadines St. Kitts and NevisSt. Lucia St. Vincent Website support.ap.dell.com Thailand Switzerland GenevaTaiwan 002 Virgin Islands A. Austin, Texas BusinessVenezuela Numeric Keypad Using the Keyboard and Touch PadKey Combinations Microsoft Windows Logo Key Functions Power ManagementTouch Pad Speaker Functions Mouse Properties window Customizing the Touch Pad Adjusting the Volume Using MultimediaPlaying a CD or DVD Copying CDs and DVDs Adjusting the PictureHow to Copy a CD or DVD Using Blank CDs and DVDs Helpful Tips Connecting Your Computer to a TV or Audio DeviceMedia Type Read Write Rewritable Composite Video and Standard Audio Video and Standard Audio Setting Up the Cyberlink CL Headphones Click Device Settings Click the DVD Audio Setting icon Wireless Local Area Network Wlan Setting Up a NetworkPhysically Connecting to a Network or Broadband Modem Network Setup Wizard Start Button and Connect To Option Checking Your Wireless Network CardSetting Up a New Wlan Connecting a Wireless Router and a Broadband Modem Determining the Wireless Network Device Manager Connecting to a Wireless Local Area NetworkUnder Pick a Help topic, click Dell User and System Guides Enabling/Disabling the Wireless Network Card Mobile Broadband or Wireless Wide Area Network WwanConnecting to a Mobile Broadband Network Internet Connection Firewall Turning Off Your Computer Adding and Replacing PartsBefore You Begin Recommended Tools Hard Drive Returning a Hard Drive to Dell Media BayRemoving the Device Security Screw Hinge Cover Removing and Installing Media Bay Devices Keyboard Memory Page Wireless Local Area Network Wlan Cards Wireless Cards Coin-Cell Battery Internal Card With Bluetooth Wireless Technology Back to Contents Dell QuickSet Security Cable Lock PasswordsUsing a Primary/System Password Securing Your Computer If Your Computer Is Lost or Stolen Using an Administrator PasswordUsing a Hard Drive Password Computer Tracking Software Back to Contents Commonly Used Settings System Setup ProgramViewing the System Setup Screens System Setup Screens Locate Fast IR under Onboard Devices Performing a One-Time BootChanging COM Ports Enabling the Infrared SensorPage Drivers Reinstalling SoftwareWhat Is a Driver? Reinstalling Drivers and Utilities Click Start→ Help and Support Using the Drivers and Utilities CDManually Reinstalling Drivers Software and Hardware Incompatibilities Restoring Your Operating System Using Microsoft Windows XP System RestoreCreating a Restore Point Undoing the Last System Restore Before You Begin Using the Operating System CDEnabling System Restore Reinstalling Windows XP Specifications Display CommunicationsVideo Audio AC Adapter BatteryKeyboard Touch Pad Environmental Physical Dell Latitude D520 Users Guide Travel Tips Traveling With Your ComputerIdentifying Your Computer Packing the Computer Back to Contents When to Use the Dell Diagnostics TroubleshootingDell Technical Update Service Dell Diagnostics Option Function Dell Diagnostics Main Menu Clicking the Dell Support Icon Drive ProblemsAccessing the Dell Support Utility Dell Support Utility If you hear an unfamiliar scraping or grinding sound CD and DVD drive problemsHard drive problems Problems writing to a CD/DVD-RW drive Error Messages Mail, Modem, and Internet ProblemsVerify that the modem is communicating with Windows CD drive controller failure Click Start→ Control Panel→ Add or Remove Programs If you have problems with an Ieee 1394 device Ieee 1394 Device ProblemsKeyboard Problems External Keyboard problems Computer stops responding Lockups and Software ProblemsUnexpected characters Computer does not start up Solid blue screen appears Memory ProblemsNetwork Problems Other software problems Restart the computer and log on to the network again PC Card or ExpressCard ProblemsGeneral Mobile Broadband Network Ensuring Sufficient Power for Your Computer Power ProblemsDocking Power Considerations Docking While the Computer Is Running Printer ProblemsScanner Problems AC Power Loss While the Computer Is Docked No sound from integrated speakers Sound and Speaker ProblemsTouch Pad or Mouse Problems No sound from headphones If the display is difficult to read Video and Display ProblemsCheck the touch pad settings If the display is blank Connect an external monitor Adjust the Windows display settingsIf only part of the display is readable Click Start→ Control Panel→ Appearance and Themes

Dell D520 specifications Internet Connection Firewall

Models: D520