3com WL-603 Manual De Usuario

C

HAPTER

 5: C

ONFIGURING

 

THE

 R

OUTER

This section is for configuration settings of the Router’s firewall function.

Your Router is equipped with a firewall that will protect your network 
from a wide array of common hacker attacks including Ping of Death 
(PoD) and Denial of Service (DoS) attacks. You can turn the firewall 
function off if needed. Turning off the firewall protection will not leave 
your network completely vulnerable to hacker attacks, but 3Com 
recommends that you leave the firewall enabled whenever possible.

Stateful Packet Inspection (SPI) - The Intrusion Detection Feature of the 
Router limits access for incoming traffic at the WAN port.

This feature is called a "stateful" packet inspection, because it examines 
the contents of the packet to determine the state of the communications; 
i.e., it ensures that the stated destination computer has previously 
requested the current communication. This is a way of ensuring that all 
communications are initiated by the recipient computer and are taking 
place only with sources that are known and trusted from previous 
interactions. In addition to being more rigorous in their inspection of 
packets, stateful inspection firewalls also close off ports until connection 
to the specific port is requested. 

Figure 68   Firewall Screen