3Com 3CRWE754G72-A - Manual (Page 51)

Firewall 51
Figure 38 Routing Table Screen
Firewall From these pages you can configure settings for the firewall.
Figure 39 Firewall Screen
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 it is
recommended that you turn the firewall on whenever possible.
1 Enable or Disable the Firewall as required by selecting the appropriate
radio button.
2 Press Apply.