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N600 Wireless Dual Band Router WNDR3400 User Manual
Customizing Your Network Settings 5-8
v1.0, August 2010
Setting Up a Default DMZ Server
The default DMZ server feature is helpful when you are using some online games and
videoconferencing applications that are incompatible with Network Address Translation (NAT).
The router is programmed to recognize some of these applications and to work correctly with
them, but there are other applications that might not function well. In some cases, one local
computer can run the application correctly if that computer’s IP address is entered as the default
DMZ server.
Incoming traffic from the Internet is usually discarded by the router unless the traffic is a response
to one of your local computers or a service that you have configured in the Port Forwarding/Port
Triggering screen. Instead of discarding this traffic, you can have it forwarded to one computer on
your network. This computer is called the default DMZ server.
The WAN Setup screen lets you configure a default DMZ server.
To assign a computer or server to be a default DMZ server:
1. Click the Default DMZ Server check box.
2. Type the IP address.
NAT Filtering Network Address Translation (NAT) determines how the router processes
inbound traffic. Secured NAT provides a secured firewall to protect the
computers on the LAN from attacks from the Internet, but might prevent some
Internet games, point-to-point applications, or multimedia applications from
functioning. Open NAT provides a much less secured firewall, but allows
almost all Internet applications to function.
Disable SIP ALG Select this feature if you have a SIP (Session Initiation Protocol) telephone or
other SIP base devices, and you want them to communicate with other
people. If you have been unable to build a successful SIP connection,
selecting this check box allows for such a connection without compromising
other SIP ALG (Application-level gateway) firewall settings, such as Disable
SPI Firewall. If you are not using SIP devices, leave this check box
unchecked.
Warning: DMZ servers pose a security risk. A computer designated as the default DMZ
server loses much of the protection of the firewall and is exposed to exploits
from the Internet. If compromised, the DMZ server computer can be used to
attack other computers on your network.
Table 5-2. WAN Setup Settings
Setting Description
- N600 Wireless Dual Band 1
- Router WNDR3400 User 1
- FCC Information to User 4
- FCC Declaration Of Conformity 5
- IMPORTANT NOTE: 6
- Contents 8
- About This Manual 12
- How to Print This Manual 13
- Revision History 13
- Chapter 1 14
- Figure 1-1 15
- Figure 1-2 16
- Figure 1-3 16
- Figure 1-4 17
- Figure 1-5 18
- Using the Setup Wizard 19
- Figure 1-6 20
- Chapter 2 23
- Safeguarding Your Network 23
- Safeguarding Your Network 2-2 24
- Wireless Security Options 25
- Safeguarding Your Network 2-4 26
- Safeguarding Your Network 2-5 27
- Figure 2-2 27
- Safeguarding Your Network 2-6 28
- Safeguarding Your Network 2-7 29
- Safeguarding Your Network 2-8 30
- Figure 2-3 30
- Safeguarding Your Network 2-9 31
- Figure 2-4 33
- Figure 2-5 35
- Figure 2-6 36
- Figure 2-7 37
- Figure 2-8 38
- Adding More WPS Clients 39
- Figure 2-9 41
- Adding Guest Networks 42
- Figure 2-10 43
- Chapter 3 45
- Protecting Your Network 45
- Protecting Your Network 3-2 46
- Figure 3-2 47
- Protecting Your Network 3-3 47
- Figure 3-1 47
- Protecting Your Network 3-4 48
- Figure 3-3 48
- Protecting Your Network 3-5 49
- Protecting Your Network 3-6 50
- Figure 3-4 50
- Figure 3-5 50
- Protecting Your Network 3-7 51
- Scheduling Blocking 52
- Field Description 53
- Protecting Your Network 3-10 54
- Figure 3-8 54
- Setting the Time 55
- Chapter 4 56
- Figure 4-1 57
- Figure 4-2 57
- Figure 4-3 58
- Figure 4-4 60
- Connection Status 63
- Statistics 64
- Figure 4-7 65
- Figure 4-8 66
- Erasing the Configuration 67
- Figure 4-9 68
- Figure 4-10 69
- Figure 4-11 70
- Traffic Meter 71
- Chapter 5 73
- Figure 5-1 74
- Table 5-1. LAN Setup 74
- Address Reservation 76
- Using a Dynamic DNS Service 77
- Figure 5-2 78
- Setup screen 79
- Configuring Static Routes 81
- Figure 5-4 82
- Figure 5-5 82
- Figure 5-6 88
- Adding a Custom Service 89
- Configuring Port Triggering 90
- Figure 5-8 92
- Figure 5-9 93
- Figure 5-10 94
- Wireless Repeating Function 95
- Setting Up the Base Station 96
- Figure 5-12 97
- Setting Up a Repeater Unit 98
- Chapter 6 99
- Fine-Tuning Your Network 99
- Fine-Tuning Your Network 6-2 100
- Fine-Tuning Your Network 6-3 101
- Fine-Tuning Your Network 6-4 102
- Figure 6-1 102
- Fine-Tuning Your Network 6-5 103
- Changing the MTU Size 104
- Quality of Service (QoS) 105
- Fine-Tuning Your Network 6-8 106
- Figure 6-2 106
- Fine-Tuning Your Network 6-9 107
- Figure 6-3 107
- Figure 6-4 107
- Fine-Tuning Your Network 6-10 108
- Figure 6-5 108
- Fine-Tuning Your Network 6-11 109
- Figure 6-6 109
- Fine-Tuning Your Network 6-12 110
- Figure 6-7 110
- Universal Plug and Play 111
- Fine-Tuning Your Network 6-14 112
- Chapter 7 113
- USB Storage 113
- File Sharing Scenarios 114
- USB Storage 7-3 115
- USB Storage Basic Settings 116
- USB Storage 7-5 117
- Figure 7-2 117
- Editing a Network Folder 118
- USB Storage 7-7 119
- Figure 7-4 119
- USB Storage 7-8 120
- Creating a Network Folder 121
- ReadyShare Access 122
- Unmounting a USB Drive 122
- USB Storage 7-11 123
- Figure 7-6 123
- Settings 124
- USB Storage 7-13 125
- Chapter 8 126
- Troubleshooting 126
- Troubleshooting 8-2 127
- Troubleshooting 8-3 128
- Troubleshooting 8-4 129
- Cannot Access the Internet 130
- Troubleshooting 8-6 131
- Troubleshooting 8-7 132
- Problems with Date and Time 133
- Wireless Connectivity 134
- Troubleshooting 8-10 135
- 5GHz a/n) on the screen 136
- Troubleshooting 8-12 137
- Troubleshooting 8-13 138
- Figure 8-2 138
- Troubleshooting 8-14 139
- Appendix A 140
- Default Configuration and 140
- Technical Specifications 140
- Appendix B 144
- Related Documents 144
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