AirLive ARM-204 - Manual (Page 42)

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5.3. Advanced Setup
5.3.1. Firewall
Parameter Description
Firewall When you enable the firewall function, it will protect you
from following attacks of WAN side:
z SYN flooding attack
z Ping of Death
z Teardrop
z Land attack
SPI If you enable SPI, all traffics initiated from WAN site will
be blocked including DMZ, Virtual Server, etc.