ZyXEL VFG6005 User Guide - Page 48

The ZyXEL VFG6005 Series VPN Firewall Gateway is able to stop responding

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ICMP Redirect Protection Firewall Gateway). Consequently, this server will suffer from a huge amount of interruptions and consumption of computing resources. The ZyXEL VFG6005 Series VPN Firewall Gateway is able to stop responding to ICMP broadcasting echo packets in order to avoid a potential ICMP broadcasting DoS attack. 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. 39

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39
Firewall Gateway). Consequently, this server will suffer from a huge amount of
interruptions and consumption of computing resources.
The ZyXEL VFG6005 Series VPN Firewall Gateway is able to stop responding to
ICMP broadcasting echo packets in order to avoid a potential ICMP broadcasting
DoS attack.
ICMP Redirect
Protection
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.