Edimax Technology AR-7167WnB - Manual (Page 42)

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