Chapter 11 Firewall Configuration
P-660W-Tx v2 User’s Guide
126
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The LAN includes both the LAN port and the WLAN.
By default, the ZyXEL Device’s stateful packet inspection allows packets traveling in the
following directions:
• LAN to LAN/ Router
This allows computers on the LAN to manage the ZyXEL Device and communicate
between networks or subnets connected to the LAN interface.
• LAN to WAN
By default, the ZyXEL Device’s stateful packet inspection blocks packets traveling in the
following directions:
• WAN to LAN
• WAN to WAN/ Router
This prevents computers on the WAN from using the ZyXEL Device as a gateway to
communicate with other computers on the WAN and/or managing the ZyXEL Device.
You may define additional rules and sets or modify existing ones but please exercise
extreme caution in doing so.
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If you configure firewall rules without a good understanding of how they work,
you might inadvertently introduce security risks to the firewall and to the
protected network. Make sure you test your rules after you configure them.
For example, you may create rules to:
• Block certain types of traffic, such as IRC (Internet Relay Chat), from the LAN to the
Internet.
• Allow certain types of traffic, such as Lotus Notes database synchronization, from specific
hosts on the Internet to specific hosts on the LAN.
• Allow everyone except your competitors to access a Web server.
• Restrict use of certain protocols, such as Telnet, to authorized users on the LAN.
These custom rules work by comparing the Source IP address, Destination IP address and IP
protocol type of network traffic to rules set by the administrator. Your customized rules take
precedence and override the ZyXEL Device’s default rules.
11.7.2 Rule Logic Overview
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Study these points carefully before configuring rules.
Содержание P-660W-T1 v2
Страница 2: ......
Страница 8: ...Safety Warnings P 660W Tx v2 User s Guide 8 ...
Страница 10: ...Contents Overview P 660W Tx v2 User s Guide 10 ...
Страница 18: ...Table of Contents P 660W Tx v2 User s Guide 18 ...
Страница 22: ...List of Figures P 660W Tx v2 User s Guide 22 ...
Страница 25: ...25 PART I Introduction Introducing the ZyXEL Device 27 Introducing the Web Configurator 31 ...
Страница 26: ...26 ...
Страница 30: ...Chapter 1 Introducing the ZyXEL Device P 660W Tx v2 User s Guide 30 ...
Страница 36: ...Chapter 2 Introducing the Web Configurator P 660W Tx v2 User s Guide 36 ...
Страница 37: ...37 PART II Setup Wizard Connection Setup Wizard 39 Media Bandwidth Management Wizard 47 ...
Страница 38: ...38 ...
Страница 46: ...Chapter 3 Connection Setup Wizard P 660W Tx v2 User s Guide 46 ...
Страница 50: ...Chapter 4 Media Bandwidth Management Wizard P 660W Tx v2 User s Guide 50 ...
Страница 52: ...52 ...
Страница 83: ...Chapter 7 WAN Setup P 660W Tx v2 User s Guide 83 Figure 32 WAN Setup PPPoE ...
Страница 104: ...Chapter 8 Network Address Translation NAT Screens P 660W Tx v2 User s Guide 104 ...
Страница 130: ...Chapter 11 Firewall Configuration P 660W Tx v2 User s Guide 130 ...
Страница 156: ...Chapter 15 Logs Screens P 660W Tx v2 User s Guide 156 ...
Страница 169: ...169 PART IV Maintenance Maintenance 171 ...
Страница 170: ...170 ...
Страница 184: ...Chapter 17 Maintenance P 660W Tx v2 User s Guide 184 ...
Страница 185: ...185 PART V Troubleshooting and Specifications Troubleshooting 187 Product Specifications 193 ...
Страница 186: ...186 ...
Страница 192: ...Chapter 18 Troubleshooting P 660W Tx v2 User s Guide 192 ...
Страница 200: ...200 ...
Страница 208: ...Appendix A Pop up Windows JavaScripts and Java Permissions P 660W Tx v2 User s Guide 208 ...
Страница 226: ...Appendix C Common Services P 660W Tx v2 User s Guide 226 ...
Страница 232: ...Appendix D Legal Information P 660W Tx v2 User s Guide 232 ...
Страница 244: ...Index P 660W Tx v2 User s Guide 244 ...