P-660HW-T v2 User’s Guide
Chapter 10 Firewall Configuration
151
4
Does a rule that allows Internet users access to resources on the LAN create a security
vulnerability? For example, if FTP ports (TCP 20, 21) are allowed from the Internet to the
LAN, Internet users may be able to connect to computers with running FTP servers.
5
Does this rule conflict with any existing rules?
6
Once these questions have been answered, adding rules is simply a matter of plugging the
information into the correct fields in the web configurator screens.
10.3.3 Key Fields For Configuring Rules
10.3.3.1 Action
Should the action be to
Drop
,
Reject
or
Permit
?
Note:
“Drop” means the firewall silently discards the packet. “Reject” means the
firewall discards packets and sends an ICMP destination-unreachable
message to the sender.
10.3.3.2 Service
Select the service from the
Service
scrolling list box. If the service is not listed, it is necessary
to first define it. See
Section 10.8 on page 163
for more information on predefined services.
10.3.3.3 Source Address
What is the connection’s source address; is it on the LAN or WAN? Is it a single IP, a range of
IPs or a subnet?
10.3.3.4 Destination Address
What is the connection’s destination address; is it on the LAN or WAN? Is it a single IP, a
range of IPs or a subnet?
10.4 Connection Direction
This section describes examples for firewall rules for connections going from LAN to WAN
and from WAN to LAN.
LAN to LAN/ Router and WAN to WAN/ Router rules apply to packets coming in on the
associated interface (LAN or WAN respectively). LAN to LAN/ Router means policies for
LAN-to-ZyXEL Device (the policies for managing the ZyXEL Device through the LAN
interface) and policies for LAN-to-LAN (the policies that control routing between two subnets
on the LAN). Similarly, WAN to WAN/ Router polices apply in the same way to the WAN
port.
Содержание P-660HW-T - V2
Страница 1: ...P 660HW T v2 802 11g Wireless ADSL 2 4 port Gateway User s Guide Version 3 40 Edition 1 12 2006...
Страница 2: ......
Страница 7: ...P 660HW T v2 User s Guide Safety Warnings 7 This product is recyclable Dispose of it properly...
Страница 26: ...P 660HW T v2 User s Guide 26 List of Figures...
Страница 40: ...P 660HW T v2 User s Guide 40 Chapter 1 Getting To Know Your ZyXEL Device...
Страница 53: ...P 660HW T v2 User s Guide Chapter 2 Introducing the Web Configurator 53 Figure 13 System General...
Страница 54: ...P 660HW T v2 User s Guide 54 Chapter 2 Introducing the Web Configurator...
Страница 74: ...P 660HW T v2 User s Guide 74 Chapter 4 Bandwidth Management Wizard...
Страница 92: ...P 660HW T v2 User s Guide 92 Chapter 5 WAN Setup...
Страница 124: ...P 660HW T v2 User s Guide 124 Chapter 7 LAN Setup...
Страница 156: ...P 660HW T v2 User s Guide 156 Chapter 10 Firewall Configuration Figure 85 Firewall Edit Rule...
Страница 170: ...P 660HW T v2 User s Guide 170 Chapter 10 Firewall Configuration...
Страница 174: ...P 660HW T v2 User s Guide 174 Chapter 11 Content Filtering...
Страница 178: ...P 660HW T v2 User s Guide 178 Chapter 12 Static Route...
Страница 190: ...P 660HW T v2 User s Guide 190 Chapter 13 Bandwidth Management...
Страница 194: ...P 660HW T v2 User s Guide 194 Chapter 14 Dynamic DNS Setup...
Страница 206: ...P 660HW T v2 User s Guide 206 Chapter 15 Remote Management Configuration...
Страница 218: ...P 660HW T v2 User s Guide 218 Chapter 16 Universal Plug and Play UPnP...
Страница 224: ...P 660HW T v2 User s Guide 224 Chapter 17 System...
Страница 244: ...P 660HW T v2 User s Guide 244 Chapter 18 Logs...
Страница 250: ...P 660HW T v2 User s Guide 250 Chapter 19 Tools...
Страница 256: ...P 660HW T v2 User s Guide 256 Chapter 21 Troubleshooting...
Страница 260: ...P 660HW T v2 User s Guide 260 Appendix A Product Specifications...
Страница 280: ...P 660HW T v2 User s Guide 280 Appendix D Wall mounting Instructions...
Страница 308: ...P 660HW T v2 User s Guide 308 Appendix G Command Interpreter...
Страница 320: ...P 660HW T v2 User s Guide 320 Appendix J Splitters and Microfilters...
Страница 334: ...P 660HW T v2 User s Guide 334 Appendix K Wireless LANs...
Страница 342: ...P 660HW T v2 User s Guide 342 Appendix L Pop up Windows JavaScripts and Java Permissions Figure 195 Java Sun...