Access Control - Planet vrt-420n User Manual

ICMP Redirect Protection
Broadcast Storming
5.2

Access Control

This section shows how to setup the Broadband router's system Time Zone, Password and Remote
Management Administrator.
Click on [Security] – [ACL] tab. You will see the following screen.
Check to enable ICMP Redirect Protection.
Uncheck to disable ICMP Redirect Protection.
An ICMP redirect message is a way to change the existing routing path. Generally, ICMP
redirect packets should not be sent, and so when there is the occurrence that ICMP
redirect packets are sent, it is important to note that it is very likely to be used as a means
for a network attack.
Check to enable Broadcast Storming Protection.
Uncheck to disable Broadcast Storming Protection.
A state in which a message that has been Broadcast across a network results in even more
responses, and each response results in still more responses in a snowball effect. A severe
broadcast storm can block all other network traffic, resulting in a network meltdown.
Broadcast storms can usually be prevented by carefully configuring a network to block
illegal broadcast messages.
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