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Improving Security
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.)
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.)