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ADSL Router Series User’s Guide
163
C
HAPTER
10
Firewall
10.1 Overview
This chapter shows you how to enable the ZyXEL Device firewall. Use the firewall to protect your
ZyXEL Device and network from attacks by hackers on the Internet and control access to it. The
firewall:
• allows traffic that originates from your LAN computers to go to all other networks.
• blocks traffic that originates on other networks from going to the LAN.
• blocks SYN and port scanner attacks.
By default, the ZyXEL Device blocks DDOS, LAND and Ping of Death attacks whether the firewall is
enabled or disabled.
The following figure illustrates the firewall action. User
A
can initiate an IM (Instant Messaging)
session from the LAN to the WAN (1). Return traffic for this session is also allowed (2). However
other traffic initiated from the WAN is blocked (3 and 4).
Figure 70
Default Firewall Action
10.1.1 What You Can Do in the Firewall Screens
• Use the
Firewall
screen (
) to enable firewall and/or IPv6 firewall on the
ZyXEL Device.
• Use the
General
screen (
) to select the firewall protection level on the
ZyXEL Device.
• Use the
Default Action
) to set the default action that the
firewall takes on packets that do not match any of the firewall rules.
• Use the
Rules
screen (
) to view the configured firewall rules and add,
edit or remove a firewall rule.
WAN
LAN
3
4
1
2
A
Summary of Contents for P-660H-61
Page 2: ......
Page 6: ...Document Conventions ADSL Router Series User s Guide 6 Server Firewall Telephone Router Switch...
Page 8: ...Safety Warnings ADSL Router Series User s Guide 8...
Page 10: ...Contents Overview ADSL Router Series User s Guide 10...
Page 20: ...Table of Contents ADSL Router Series User s Guide 20...
Page 21: ...21 PART I User s Guide...
Page 22: ...22...
Page 28: ...Chapter 1 Introduction ADSL Router Series User s Guide 28...
Page 40: ...Chapter 3 Status Screens ADSL Router Series User s Guide 40...
Page 76: ...Chapter 4 Tutorials ADSL Router Series User s Guide 76...
Page 77: ...77 PART II Technical Reference...
Page 78: ...78...
Page 150: ...Chapter 8 Wireless LAN ADSL Router Series User s Guide 150...
Page 198: ...Chapter 13 Static Route ADSL Router Series User s Guide 198...
Page 202: ...Chapter 14 Port Binding ADSL Router Series User s Guide 202...
Page 208: ...Chapter 15 802 1Q 1P ADSL Router Series User s Guide 208...
Page 258: ...Chapter 21 Sharing a USB Printer ADSL Router Series User s Guide 258...
Page 262: ...Chapter 22 CWMP ADSL Router Series User s Guide 262...
Page 266: ...Chapter 23 System Settings ADSL Router Series User s Guide 266...
Page 270: ...Chapter 24 Logs ADSL Router Series User s Guide 270...
Page 326: ...Appendix C Pop up Windows JavaScripts and Java Permissions ADSL Router Series User s Guide 326...
Page 340: ...Appendix D Wireless LANs ADSL Router Series User s Guide 340...
Page 350: ...Appendix E IPv6 ADSL Router Series User s Guide 350...
Page 362: ...Appendix G Legal Information ADSL Router Series User s Guide 362...