D-Link DSL-502T manual Advanced Security, Enable/Disable NAT and Firewall

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DSL-502T ADSL Router User’s Guide

Advanced Security

Use the Advanced Security features of the Router to globally enable or disable NAT and Firewall protection for any WAN connection, enable or disable DMZ IP addresses, enable or disable remote Telnet or web management from specified IP addresses, and enable/disable ICMP ping packets from the WAN.

Figure 4-8. Advanced Security menu

Follow the instructions below to set up the Advanced Security features. To enable ICMP Ping packets from the WAN, click to check the Allow Incoming ICMP Ping selection box and click the Apply button. The ICMP (Internet Control Message Protocol) Ping packet is used to test connectivity of IP devices. Keep in mind that when this is enabled, the Router may be vulnerable to denial of service type attacks.

Enable/Disable NAT and Firewall

NAT and basic Firewall protection can be enabled or disabled for any WAN connection. These may also be enabled or disabled when configuring the WAN connection for any connection type except Bridge connections. By default, they are enabled for WAN connections (except Bridge connections) when they are first set up. Firewall protection includes the previously discussed Port Forwarding and Access Control. Therefore, this must be enabled to use these features.

To enable NAT and Firewall protection for any WAN connection including Bridge type connections, check the Enable NAT and Firewall Services selection box and click the Apply button. Be sure to save the changes in the System Commands menu or the settings will be lost.

To disable NAT and Firewall Services, deselect it and click the Apply button. Be aware that this remove basic security and expose your LAN to potentially malicious agents form the WAN.

Remember to save the configuration changes.

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Contents DSL-502T Adsl Router User’s Guide FCC Warning DSL-502T DSL Router User’s GuideWarranties Exclusive Wichtige SicherheitshinweiseSoftware HardwareWarranty and Registration Information for USA Only DSL-502T DSL Router User’s Guide Table of Contents Remote Log Update Gateway Ping Test OAM Test Before You Start Installation RequirementsAbout This User’s Guide About Clip Connections RFC Web BrowserEthernet Port NIC Adapter Additional SoftwareInformation you will need from your Adsl service provider Information you will need about your LAN or computer Installing the USB Driver DSL-502T DSL Router User’s Guide DSL-502T DSL Router User’s Guide Page Router Description and Operation What is ADSL?Router Features Standards Compatibility and Compliance Packing List Front Panel DisplayRear Panel Connections Factory Reset Button Power on RouterConnect Router to Ethernet Hub or Switch to Router ConnectionNetwork Connections Connect Adsl LineComputer to Router Connection Wan Configuration Summary Configuring IP Settings on Your ComputerConfigure Windows XP for Dhcp DSL-502T Adsl Router User’s Guide Windows Configure Windows 2000 for DhcpWindows 95 and Windows Configure Windows ME for DhcpWindows ME Windows NT 4.0 Workstations Configure Windows 95 and Windows 98 for DhcpConfigure Windows NT 4.0 for Dhcp Login to Home Access the Configuration ManagerHome Status Information window Configure the RouterOpening Setup window Setup MenuDSL Setup menu change modulation type DSL Modulation SettingsPPPoA Connection 1 Setup menu Configure Connection 1 for PPPoAChange the Connection Type Configure Connection 1 for PPPoEConfigure Connection 1 for Bridge Setup Configure Connection 1 for Bridge Setup Configure Connection 1 for Static IP for the WAN Configure Connection 1 for Static IP for WANSetup Configure Connection 1 for Dhcp service for the WAN Configure Connection 1 for Dhcp for WAN10. Setup Configure Connection 1 for Clip IPoA Configure Connection 1 for ClipCreate a New Connection New Connection Example 1 Create a New PPPoE Connection 11. Setup a New Connection ConnectionNew Connection Example 2 Create a New Bridge Connection 12. Setup a New Connection ConnectionLease Time Dhcp Configuration for LANDhcp Parameter Description Start IP End IP14. Configure Dhcp Relay Service Enable Dhcp RelayManagement IP 15. Configure Management IP16. Router Tools Menus Save Configuration Changes17. Available System Commands Advanced Router Management Advanced UPnP window UPnPLAN Clients LAN Clients SetupAdvanced Port Forwarding window Port ForwardingServers Category Available Rules GamesAudio/Video ApplicationsSet up Custom Port Forwarding Rules Port Forwarding User Rules Management Access Control menu Access ControlVPN Advanced Security Enable/Disable NAT and FirewallDMZ IP Address Setup Remote ManagementBridge Filters 10. Multicast pass-through menu Multicast Pass-through11. Static Routing menu Static Routing12. Dynamic Routing RIP menu Dynamic RoutingMultiple Virtual Connections 13. Tools and utility menu links Tools and Utility Menus14. User Management menu User ManagementRestart System CommandsRestore System Function Description Save All16. Remote Log menu Remote Log17. Tools Update Gateway window Update Gateway18. Tools Ping Test window Ping Test19. Tools OAM Test window OAM Test20. Status display links Status Menus21. Network Statistics window Network StatisticsDhcp Clients Connection StatusProduct Information Modem StatusHelp Menu System LogRate StandardsProtocols Data TransferFCC Class B, CE Class B Physical and EnvironmentalManual IP Address Assignment Using the Default IP AddressAssigning Network IP Addresses Changing the IP Address of the Router Using DhcpIP Setup Example #2 IP Addresses IP ConceptsClass Beginning Address Ending Address IP Network ClassesIP Class Subnet Mask Subnet MaskMicrofilters Microfilter InstallationLine Splitter Line Splitter InstallationPage Offices Italy Link Mediterraneo Srl/D-Link Italia Link U.S.A Registration Card