Cisco Systems E1200 manual How to improve security using the built-in firewall, Security-Firewall

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Linksys E-Series

7.Click Save Settings at the bottom of the page..

8.Click Wireless Client List again to check the updated device list.. Only the device you selected remains on the network..

How to improve security using the built-in firewall

Why would I need to change my security settings? By default, the firewall settings in your router have been optimized for most home environments, so no changes are needed.. The SPI (Stateful Packet Inspection) firewall is enabled by default.. In addition, anonymous Internet requests and IDENT requests are filtered by default.. All web filters are disabled, because enabling them may cause problems for sites that depend on ActiveX controls, Java, or cookies..

General firewall settings

To change your firewall settings:

Security->Firewall

1.Log into the browser-based utility (see “How to open the browser-based utility” on page 25)..

2.Click the Security tab, then click the Firewall page.. (Not all routers have the options shown here..)

Improving Security

3.Select each setting that you want to change..

Tip

For descriptions of the filters, click Help on the right side of the screen.. More complete descriptions are included below..

•• SPI Firewall Protection—This helps protect your local network from Internet threats.. This option is enabled by default.. On some router models, this setting is separated into IPv6 and IPv4 options so that each can be handled separately..

Caution

To help protect your network, you should keep this option enabled..

•• Filter Anonymous Internet Requests—This filter blocks Internet requests from unknown sources such as ping requests.. This option is enabled by default..

•• Filter Multicast—Multicasting allows a single transmission to simultaneously reach specific recipients within your local network.. Select this option to block multicasting.. This option is disabled by default..

•• Filter Internet NAT Redirection for IPv4 Internet Only—This filter prevents a local computer from using a URL or Internet IP address to access the local server.. Select this option to enable the filter.. This option is disabled by default.. On some router models, this setting applies to IPv4 Internet only..

•• Filter IDENT (Port 113)—This filter prevents port 113 from being scanned by devices from the Internet.. This option is enabled by default..

•• Proxy—This filter blocks the use of Internet proxy servers.. To deny proxy requests, select this option.. Proxy access is allowed by default.. (Not available on the E4200..)

•• Java—This filter blocks Java, so you may not be able to access Java content on websites.. To deny Java requests, select this option.. Java content is allowed by default.. (Not available on the E4200..)

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Contents User Guide Linksys E-Series E900 Contents Browser-based Utility Menu Structure E1200/E1500 Contents E1200/E1500 Contents E2500 Contents E2500 Contents E3200 Contents Browser-based Utility Menu Structure E4200 Contents Using an External Drive Maintaining and Monitoring Product overview Package contentsFeatures E900Back view Port activity indicatorBottom view E1200/E1500 SpeedBoostE1200V1/E1500 Determining your router’s version Canada ICES/NMB003, RSS210Power of dual band E2500Ethernet ports Wi-Fi Protected Setup button E3200 Benefits of gigabitPort activity indicators E4200 Built-in USB port and UPnP media serverTop view Product overview Where to find more help Setting Up BasicsHow to create a home network How to set up your routerHow to start Cisco Connect How to test your Internet connection speed How to improve your wireless connection speedTo test your Internet connection speed How to connect a computer using an Easy Setup Key How to connect devices to your networkHow to connect a computer to your network To create an Easy Setup KeyHow to connect a computer manually To manually connect a computer to your networkHow to connect other devices How to connect a printerTo connect a wireless printer to your network To manually connect a device to your network To access parental controls for the first time How to set up parental controlsHow to access parental controls To access parental controls after the first timeTo change the parental controls password How to select the computers to have parental controlsTo select computers that will have parental controls How to set up guest access to your network How to set parental controlsTo set up guest access to your network How to change your router’s name and password To change your router’s name and passwordFor ALL Setting Up AdvancedHow to open the browser-based utility To open the browser-based utilityBasic Internet connection settings How to manually set up your routerHow to manually set up your Internet connection To manually set up your routerTo manually configure your router’s IPv6 settings How to get the most out of your dual- band routerIPv6 Internet connection settings Setup IPv6 SetupWireless-A Only 802..11a only Wireless-N Only 802..11n only To reconfigure your wireless networkWireless Basic Wireless Settings or Wireless Settings Auto 20 MHz or 40 Mhz MHz OnlySetup Basic Setup Dhcp Server Settings How to set up the Dhcp server on your routerTo configure your router’s Dhcp server settings Auto 20 MHz or 40Mhz MHz OnlyTo configure Dhcp reservation How to find your network on the InternetHow to set up Dhcp reservation Click Save SettingsBronzeEagle953.linksysnet.com1024 How to clone a MAC addressSetup MAC Address Clone To clone a MAC address from your computerTo change your VPN passthrough settings How to connect to your corporate office using a VPNHow to optimize your router for gaming and voice Security VPN PassthroughTo configure QOS Applications & Gaming QoSAdministration Management How to remotely change your router settingsConfigure Upstream Bandwidth To access your router remotelyTo configure the router for VoIP How to enable Voice over IP on your networkHow to configure UPnP To configure UPnPFor Internet Connection Type, select Bridge Mode How to use a router as an access pointTo view your new router’s settings How to put your new router behind an existing router To use your old router as an access pointTo share an Internet connection To add a router to your existing wireless networkTo add your router to an existing router or gateway To add another router to share an Internet connectionTo use their DNS To extend your network or add wireless capabilitiesTo extend your network This topic covers cases three and four aboveTo set up a device in the DMZ How to expose a device to the InternetApplications & Gaming DMZ Setting Up Advanced Improving Security Network security following a manual setupHow do I know if my network is secure? Connecting a device using the Wi-Fi Protected Setup button How to set up wireless security using Wi‑Fi Protected SetupWi-Fi Protected Setup activity light To manually set your router’s wireless security settingsHow to connect a device manually How to connect a device using its Wi-Fi Protected Setup PINWireless Basic Wireless Settings How to control access to your wireless network Wireless Wireless MAC FilterTo change your firewall settings How to improve security using the built-in firewallGeneral firewall settings Security-FirewallTo set IPv6 firewall settings IPv6 firewall settingsApplications & Gaming-IPv6 Firewall How to create shared folders Using an External DriveHow to configure storage To create a shared folderHow to disable anonymous disk access How to manage group and user access to shared foldersHow to create a group To disable anonymous disk accessHow to create a new user To create a new userHow to grant group access to a share To grant group access to a shareTo set up your router for remote file access, you need to How to configure your router’s storage for remote accessHow to configure the FTP server To configure the FTP serverHow to share folders and set access rights To configure FTP and control folder accessTo access files remotely How to access files remotelyHow to set up your router as a media server To configure your router as a media serverLinksys E-Series How to connect your UPnP device to the media server To connect an UPnP device to your router’s media serverPort Forwarding and Port Triggering How to set up port forwardingHow to set up port forwarding for a single port Applications & Gaming Single Port ForwardingHow to set up port forwarding for a range of ports How to set up port forwarding for multiple portsTo set up single port forwarding for multiple ports Applications & Gaming Port Range Forwarding How to set up port range triggering for online gamingTo set up port range forwarding Applications & Gaming Port Range TriggeringHow to configure your Xbox for online gaming To back up your router configuration How to back up and restore your router configurationHow to restore factory defaults To restore your router configurationAdministration Factory Defaults How to upgrade the router’s firmwareClick Restore Factory Defaults To upgrade the router’s firmware Administration Firmware UpgradeHow to check the status of your router To check your router status using the browser-based utilityHow to disable the Ethernet port status lights To disable the lights using the browser-based utility How to test your Internet connectionAdministration Diagnostics To enable and view router logs How to configure and use logsAdministration Log Maintaining and Monitoring Setup Browser-based Utility Menu StructureBrowser-based Utility Menu Structure Wi-Fi Protected Setup Storage Access Restrictions Linksys E900 SpecificationsEnvironmental Specifications Linksys E1200Linksys E1500 Linksys E2500 Linksys E3200 Linksys E4200 3425-01486 111216MS
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