Alpha Telecom Arion 3100, User Manual

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F
IREWALL
4-35
The ADSL Router’s firewall inspects packets at the application layer,
maintains TCP and UDP session information including timeouts and
number of active sessions, and provides the ability to detect and prevent
certain types of network attacks such as DoS attacks.
Network attacks that deny access to a network device are called Denial-of-
Service (DoS) attacks. Denial of Service (DoS) attacks are aimed at devices
and networks with a connection to the Internet. Their goal is not to steal
information, but to disable a device or network so users no longer have
access to network resources.
The ADSL Router protects against DoS attacks including: Ping of Death
(Ping flood) attack, SYN flood attack, IP fragment attack (Teardrop
Attack), Brute-force attack, Land Attack, IP Spoofing attack, IP with zero
length, TCP null scan (Port Scan Attack), UDP port loopback, Snork
Attack.
Note: The firewall does not significantly affect system performance, so
we advise enabling the prevention features to protect your
network.