Chapter 10 Firewall Configuration
P-660HW-Dx v2 User’s Guide
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3
Is it possible to modify the rule to be more specific? For example, if IRC is blocked for
all users, will a rule that blocks just certain users be more effective?
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
?
"
“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
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.
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Страница 7: ...Safety Warnings P 660HW Dx v2 User s Guide 7...
Страница 8: ...Safety Warnings P 660HW Dx v2 User s Guide 8...
Страница 10: ...Contents Overview P 660HW Dx v2 User s Guide 10...
Страница 19: ...Table of Contents P 660HW Dx v2 User s Guide 19 Index 351...
Страница 20: ...Table of Contents P 660HW Dx v2 User s Guide 20...
Страница 26: ...List of Figures P 660HW Dx v2 User s Guide 26...
Страница 31: ...31 PART I Introduction Introducing the ZyXEL Device 33 Introducing the Web Configurator 39...
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Страница 51: ...51 PART II Wizards Wizard Setup for Internet Access 53 Bandwidth Management Wizard 67...
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Страница 66: ...Chapter 3 Wizard Setup for Internet Access P 660HW Dx v2 User s Guide 66...
Страница 72: ...Chapter 4 Bandwidth Management Wizard P 660HW Dx v2 User s Guide 72...
Страница 73: ...73 PART III Network WAN Setup 75 LAN Setup 93 Wireless LAN 105 Network Address Translation NAT Screens 129...
Страница 74: ...74...
Страница 92: ...Chapter 5 WAN Setup P 660HW Dx v2 User s Guide 92...
Страница 128: ...Chapter 7 Wireless LAN P 660HW Dx v2 User s Guide 128...
Страница 141: ...141 PART IV Security Firewalls 143 Firewall Configuration 155 Content Filtering 177 Certificates 145...
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Страница 162: ...Chapter 10 Firewall Configuration P 660HW Dx v2 User s Guide 162 Figure 92 Firewall Edit Rule...
Страница 176: ...Chapter 10 Firewall Configuration P 660HW Dx v2 User s Guide 176...
Страница 180: ...Chapter 11 Content Filtering P 660HW Dx v2 User s Guide 180...
Страница 182: ...182...
Страница 186: ...Chapter 12 Static Route P 660HW Dx v2 User s Guide 186...
Страница 202: ...Chapter 14 Dynamic DNS Setup P 660HW Dx v2 User s Guide 202...
Страница 224: ...Chapter 16 Universal Plug and Play UPnP P 660HW Dx v2 User s Guide 224...
Страница 225: ...225 PART VI Maintenance and Troubleshooting System 227 Logs 233 Tools 251 Diagnostic 257 Troubleshooting 259...
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Страница 232: ...Chapter 17 System P 660HW Dx v2 User s Guide 232...
Страница 250: ...Chapter 18 Logs P 660HW Dx v2 User s Guide 250...
Страница 256: ...Chapter 19 Tools P 660HW Dx v2 User s Guide 256...
Страница 264: ...264...
Страница 332: ...Appendix F Internal SPTGEN P 660HW Dx v2 User s Guide 332...
Страница 346: ...Appendix J Legal Information P 660HW Dx v2 User s Guide 346...
Страница 358: ...Index P 660HW Dx v2 User s Guide 358...