When the Stateful Packet Inspection (SPI) firewall feature is enabled, all packets can be blocked.  SPI allows full support of different application types that use dynamic port numbers.  For the applications selected in the list below, the router will support operations that are initiated on the local LAN.

The router's firewall can block common hacker attacks, including IP Spoofing, Land Attack, Ping of Death, IP with zero length, Smurf Attack, UDP port loopback, Snork Attack, TCP null scan, and TCP SYN flooding.

• Intrusion Detection Feature

SPI and Anti-DoS firewall protection
RIP defect
Discard Ping To WAN

• Stateful Packet Inspection

Packet Fragmentation
TCP Connection
UDP Session
FTP Service
H.323 Service
TFTP  Service

• When hackers attempt to enter your network, we can alert you by e-mail

Your E-mail Address :

SMTP Server Address :

POP3 Server Address :

User name :

Password :

• Connection Policy

Fragmentation half-open wait: secs

TCP SYN wait: sec.

TCP FIN wait: sec.

TCP connection idle timeout: sec.

UDP session idle timeout: sec.

H.323 data channel idle timeout: sec.

• DoS Detect Criteria:

Total incomplete TCP/UDP sessions HIGH: session

Total incomplete TCP/UDP sessions LOW: session

Incomplete TCP/UDP sessions (per min) HIGH: session

Incomplete TCP/UDP sessions (per min) LOW: session

Maximum incomplete TCP/UDP sessions number from same host:

Incomplete TCP/UDP sessions detect sensitive time period: msec.

Maximum half-open fragmentation packet number from same host:

Half-open fragmentation detect sensitive time period: msec.

Flooding cracker block time: sec.