Security - TRENDnet TEW-431BRP User Manual

Security

This screen allows you to set Firewall and other security-related options.
Figure 45: Security Screen
Data - Security Screen
Firewall
If enabled, DoS (Denial of Service) attacks will be detected and
Enable DoS
blocked. The default is enabled. It is strongly recommended that this
Firewall
setting be left enabled.
Note:
•
A DoS attack does not attempt to steal data or damage your PCs,
but overloads your Internet connection so you can not use it - the
service is unavailable.
•
This device uses "Stateful Inspection" technology. This system
can detect situations where individual TCP/IP packets are valid,
but collectively they become a DoS attack.
This setting affects the number of "half-open" connections allowed.
Threshold
•
A "half-open" connection arises when a remote client contacts the
Server with a connection request, but then does not reply to the
Server's response.
•
While the optimum number of "half-open" connections allowed
(the "Threshold") depends on many factors, the most important
factor is the available bandwidth of your Internet connection.
•
Select the setting to match the bandwidth of your Internet connec-
tion.
Other Features and Settings
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TEW-431BRP User Guide
Options
The ICMP protocol is used by the "ping" and "traceroute" programs,
Respond to
and by network monitoring and diagnostic programs.
ICMP
•
If checked, the Broadband Router will repond to ICMP packets
received from the Internet.
•
If not checked, ICMP packets from the Internet will be ignored.
Disabling this option provides a slight increase in security.
The IPSec protocol is used to establish a secure connection, and is
Allow IPsec
widely used by VPN (Virtual Private Networking) programs.
•
If checked, IPSec connections are allowed.
•
If not checked, IPSec connections are blocked.
PPTP (Point to Point Tunneling Protocol) is widely used by VPN
Allow PPTP
(Virtual Private Networking) programs.
•
If checked, PPTP connections are allowed.
•
If not checked, PPTP connections are blocked.
L2TP is a protocol developed by Cisco for VPNs (Virtual Private
Allow L2TP
Networks).
•
If checked, L2TP connections are allowed.
•
If not checked, L2TP connections are blocked.
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