Linksys EA2750 User Manual page 38

You can now change the following settings:
Firewall
SPI firewall protection
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option is enabled by default. 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
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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
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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
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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
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sources such as ping requests. This option is enabled by default.
Filter multicast---- - Multicasting allows a single transmission to simultaneously reach specific
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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
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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
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Internet. This option is enabled by default.
Tip—For more descriptions of each setting, click Help at the top of the screen.
Changing IPv6 firewall settings
The IPv6 firewall lets you customize IPv6 port services for applications. When users send these types
of requests to your network via the Internet, the router will allow those requests to the appropriate
computers.
Note---- - To use your router's IPv6 Internet connection settings, IPv6 service from your ISP (Internet
service provider) is required. For more information on this service, ask your ISP.
---- - This helps protect your local network from Internet threats. This
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