Bedienungsanleitung Linksys EA4500 - N900 (Seite 40 von 144) (Englisch, Französisch)

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Setting Up: Advanced

Linksys EA-Series

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.

Changing firewall settings

To change your firewall settings:

Log into Linksys Smart Wi-Fi. (See “How to configure your router” on page

14.

Under Router Settings, click Security. The Security page opens to the

Firewall tab.

You can now change the following settings:

TIP

For more descriptions of each setting, click Help at the top of the

screen.

• Firewall: 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.

• VPN Passthrough:

• IPSec Passthrough – IPSec (Internet Protocol Security) is a suite of

protocols used to implement secure exchange of packets at the IP

layer. The VPN clients on the local network can establish an IPSec

VPN tunnel through the router. This option is enabled by default.

• PPTP Passthrough – PPTP (Point-to-Point Tunneling Protocol)

allows the PPP (Point-to-Point Protocol) to be tunneled through

an IP network. The VPN clients on the local network can establish

a PPTP VPN tunnel through the router. This option is enabled by

default.

• L2TP Passthrough – L2TP (Layer 2 Tunneling Protocol) enables

point-to-point sessions using the Internet on the Layer 2 level.

The VPN clients on the local network can establish an L2TP VPN

tunnel through the router. This option is enabled by default.

• Internet filters:

• 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. On some router models, this setting applies

to IPv4 Internet only.

• Filter ident (Port 133)—This filter prevents port 133 from being

scanned by devices from the Internet. This option is enabled by

default.

Click Save to save your changes.

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