Firewall - D-Link BROADBAND DSL-2740B User Manual

Section 3 - Configuration
The Firewall Configuration window allows the Router to enforce specific predefined policies intended to protect against certain common types of
attacks. There are two general types of protection (DoS, Port Scan) that can be enabled on the Router, as well as filtering for specific packet types
sometimes used by hackers.
SPI: SPI (Stateful Packet Inspection) is a
firewall feature that checks the state of
network connections. Only legitimate
packets are allowed to passthrough.
DoS and Port A DoS (denial-of-service) attack is
characterized by an explicit attempt by
Scan
attackers to prevent legitimate users of a
Protection:
service from
Examples include: attempts to "flood" a
network, thereby preventing legitimate
network traffic, attempts to disrupt
connections between two machines,
thereby preventing access to a service,
attempts
individual from accessing a service, or,
attempts to disrupt service to a specific
system or person.
Port scan protection is designed to block
attempts to discover vulnerable ports or
services that might be exploited in an
attack from the WAN.
Select specific VPN type from the VPN
VPN
Passthrough check-box if a VPN client
Passthrough:
is used behind the Router.
D-Link DSL-2740B User Manual
using that service.
to prevent a particular

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