P-661HNU-Fx User’s Guide
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C
H A P T E R
1 3
Firewall
13.1 Overview
Use the ZyXEL Device firewall screens to enable and configure the firewall that
protects your ZyXEL Device and network from attacks by hackers on the Internet
and control access to it. By default the firewall:
• allows traffic that originates from your LAN and WLAN computers to go to all
other networks.
• blocks traffic that originates on other networks from going to the LAN and
WLAN.
The following figure illustrates the default 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 82
Default Firewall Action
13.1.1 What You Can Do in this Chapter
• Use the General screen to enable or disable the ZyXEL Device’s firewall
(
• Use the Services screen to view the configured firewall rules and add, edit or
remove a firewall rule (
).
WAN
LAN
3
4
1
2
A
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Страница 8: ...Safety Warnings P 661HNU Fx User s Guide 8...
Страница 10: ...Contents Overview P 661HNU Fx User s Guide 10...
Страница 18: ...Table of Contents P 661HNU Fx User s Guide 18 Appendix G Legal Information 393 Index 1...
Страница 19: ...19 PART I User s Guide...
Страница 20: ...20...
Страница 28: ...Chapter 1 Introduction P 661HNU Fx User s Guide 28...
Страница 36: ...Chapter 2 Introducing the Web Configurator P 661HNU Fx User s Guide 36...
Страница 79: ...79 PART II Technical Reference...
Страница 80: ...80...
Страница 86: ...Chapter 4 Connection Status and System Info Screens P 661HNU Fx User s Guide 86...
Страница 140: ...Chapter 6 Wireless P 661HNU Fx User s Guide 140...
Страница 172: ...Chapter 8 Routing P 661HNU Fx User s Guide 172...
Страница 176: ...Chapter 9 DNS Route P 661HNU Fx User s Guide 176...
Страница 260: ...Chapter 24 Backup Restore P 661HNU Fx User s Guide 260...
Страница 281: ...Chapter 27 Product Specifications P 661HNU Fx User s Guide 281...
Страница 282: ...Chapter 27 Product Specifications P 661HNU Fx User s Guide 282...
Страница 334: ...Appendix C Pop up Windows Java Script and Java Permissions P 661HNU Fx User s Guide 334...
Страница 358: ...Appendix D Wireless LANs P 661HNU Fx User s Guide 358...
Страница 392: ...Appendix F Open Software Announcements P 661HNU Fx User s Guide 392...
Страница 403: ...Index P 661HNU Fx User s Guide 403...
Страница 404: ...Index P 661HNU Fx User s Guide 404...