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Using the web-based advanced user interface, Configuring the firewall – Belkin F5D8633-4 User Manual

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Using the Web-Based Advanced User Interface

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Configuring the Firewall

Your Router is equipped with a firewall that will protect your network
from a wide array of common hacker attacks including:

IP Spoofing

Land Attack Ping of Death (PoD)

Denial of Service (DoS)

IP with zero length

Smurf Attack

TCP Null Scan

SYN flood

UDP flooding

Tear Drop Attack

ICMP defect

RIP defect

Fragment flooding

The firewall also masks common ports that are frequently used to
attack networks. These ports appear to be “stealth” meaning that
for all intents and purposes, they do not exist to a would-be hacker.
Disabling the firewall protection will not leave your network completely
vulnerable to hacker attacks, but it is recommended that you leave the
firewall enabled.