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Chapter 10 Firewall
P-660HN-TxA User’s Guide
152
device or network so users no longer have access to network resources. The
ZyXEL Device is pre-configured to automatically detect and thwart all known DoS
attacks.
DDoS
A DDoS attack is one in which multiple compromised systems attack a single
target, thereby causing denial of service for users of the targeted system.
LAND Attack
In a LAND attack, hackers flood SYN packets into the network with a spoofed
source IP address of the target system. This makes it appear as if the host
computer sent the packets to itself, making the system unavailable while the
target system tries to respond to itself.
Ping of Death
Ping of Death uses a "ping" utility to create and send an IP packet that exceeds
the maximum 65,536 bytes of data allowed by the IP specification. This may
cause systems to crash, hang or reboot.
SPI
Stateful Packet Inspection (SPI) tracks each connection crossing the firewall and
makes sure it is valid. Filtering decisions are based not only on rules but also
context. For example, traffic from the WAN may only be allowed to cross the
firewall in response to a request from the LAN.
Summary of Contents for P-660HN-TxA
Page 2: ......
Page 8: ...Safety Warnings P 660HN TxA User s Guide 8...
Page 10: ...Contents Overview P 660HN TxA User s Guide 10...
Page 18: ...Table of Contents P 660HN TxA User s Guide 18...
Page 19: ...19 PART I User s Guide...
Page 20: ...20...
Page 28: ...Chapter 1 Introduction P 660HN TxA User s Guide 28...
Page 57: ...57 PART II Technical Reference...
Page 58: ...58...
Page 102: ...Chapter 7 LAN Setup P 660HN TxA User s Guide 102...
Page 150: ...Chapter 9 Network Address Translation NAT P 660HN TxA User s Guide 150...
Page 154: ...Chapter 10 Firewall P 660HN TxA User s Guide 154...
Page 164: ...Chapter 12 Static Route P 660HN TxA User s Guide 164...
Page 190: ...Chapter 16 Remote Management P 660HN TxA User s Guide 190...
Page 206: ...Chapter 18 CWMP P 660HN TxA User s Guide 206...
Page 228: ...Chapter 21 Tools P 660HN TxA User s Guide 228...
Page 238: ...Chapter 23 Troubleshooting P 660HN TxA User s Guide 238...
Page 270: ...Appendix A Setting up Your Computer s IP Address P 660HN TxA User s Guide 270...
Page 280: ...Appendix B IP Addresses and Subnetting P 660HN TxA User s Guide 280...
Page 290: ...Appendix C Pop up Windows JavaScripts and Java Permissions P 660HN TxA User s Guide 290...
Page 322: ...Index P 660HN TxA User s Guide 322...
Page 323: ...Index P 660HN TxA User s Guide 323...
Page 324: ...Index P 660HN TxA User s Guide 324...