Linksys E1550 manual How to improve security using the built-in firewall, Security-Firewall

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Linksys E1550

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.

To change your firewall settings:

Security->Firewall

1.Log into the browser-based utility (see “How to open the browser-based utility” on page 14).

2.Click the Security tab, then click the Firewall page.

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.

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.

Improving Security

••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—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.

••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.

••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.

••ActiveX - This filter blocks ActiveX, so you may not be able to access ActiveX content on websites. To deny ActiveX requests, select this option. ActiveX content is allowed by default.

••Cookies - This filter blocks cookies, which are data stored on your computer and used by websites when you interact with them. To deny cookie requests, select this option. Cookie usage is allowed by default.

4.Click Save Settings to update your changes.

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Contents User Guide Contents Specifications Features Package contentsProduct overview Back view Bottom viewWhere to find more help Setting Up BasicsHow to create a home network How to set up your routerTo start Cisco Connect for the first time How to start Cisco ConnectClick Set up your Linksys Router. If you do not see this To start Cisco Connect on a Windows computerHow to install Cisco Connect on another computer How to improve your wireless connection speedHow to test your Internet connection speed To install Cisco Connect onto another computerHow to connect a computer to your network How to connect devices to your networkTo create an Easy Setup Key How to connect a computer manually To manually connect a computer to your networkTo connect a wireless printer to your network How to connect a printerHow to connect other devices To manually connect a device to your networkHow to access parental controls How to set up parental controlsTo access parental controls for the first time To access parental controls after the first time To change the parental controls passwordHow to set parental controls 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 To set up guest access to your networkHow to change your router’s name and password To change your router’s name and passwordHow to manually set up your router Setting Up AdvancedHow to open the browser-based utility To manually set up your routerTo manually configure your router’s Internet connection How to set up the Dhcp server on your routerHow to manually set up your Internet connection To configure your router’s Dhcp server settingsTo configure Dhcp reservation How to find your network on the InternetHow to set up Dhcp reservation Setup Basic Setup Dhcp ReservationBronzeEagle953.linksysnet.com1024 How to clone a MAC addressTo set up Ddns To clone a MAC address from your computerTo change your VPN passthrough settings How to connect to your corporate office using a VPNSecurity VPN Passthrough To configure QOS How to optimize your router for gaming and voiceApplications & Gaming QoS Configure Upstream Bandwidth How to remotely change your router settingsAdministration Management To access your router remotely How to enable Voice over IP on your networkHow to configure UPnP To configure the router for VoIPTo view your new router’s settings How to use a router as an access pointTo use your old router as an access point To add your router to an existing router or gateway How to put your new router behind an existing routerTo add a router to your existing wireless network To share an Internet connectionTips To set up a device in the DMZ How to expose a device to the InternetTo extend your network or add wireless capabilities To extend your networkClick Save Settings to apply your changes Improving Security Network security following a manual setupHow do I know if my network is secure? Wi-Fi Protected Setup activity light How to set up wireless security using Wi‑Fi Protected SetupConnecting a device using the Wi-Fi Protected Setup button How to connect a device using its Wi-Fi Protected Setup PIN How to connect a device manuallyHow to control access to your wireless network Wireless Wireless MAC FilterTo change your firewall settings How to improve security using the built-in firewallSecurity-Firewall How to create shared folders Using an External DriveHow to configure storage To create a shared folderTo disable anonymous disk access How to manage group and user access to shared foldersHow to create a group Storage AdministrationHow 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 accessHow to access files remotely To access files remotelyPort 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 configurationClick Restore Factory Defaults How to upgrade the router’s firmwareAdministration Factory Defaults To upgrade the router’s firmwareHow to check the status of your router To check your router status using the browser-based utility How to disable the Ethernet port status lights To disable the lights using the browser-based utilityHow to test your Internet connection Administration DiagnosticsHow to configure and use logs Administration LogSpecifications Linksys E1550Setup Browser-based Utility Menu Structure3425-00977
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