Linksys E1550 User Manual
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Improving Security
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
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
•
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