Netgear RANGEMAX WNDR3300 User Manual Page 45
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NETGEAR RangeMax™ Dual Band Wireless-N Router WNDR3300 Reference Manual
Safeguarding Your Network 2-21
v1.0, February 2008
Understanding Your Firewall
Your RangeMax Dual Band Wireless-N Router WNDR3300 contains a true firewall to protect
your network from attacks and intrusions. A firewall is a device that protects one network from
another while allowing communication between the two. Using a process called Stateful Packet
Inspection, the firewall analyzes all inbound and outbound traffic to determine whether or not it
will be allowed to pass through.
By default, the firewall allows any outbound traffic and prohibits any inbound traffic except for
responses to your outbound traffic. However, you can modify the firewall’s rules to achieve the
following behavior:
• Blocking sites. Block access from your network to certain Web locations based on Web
addresses and Web address keywords. This feature is described in “Blocking Access to
Internet Sites” on page 3-1.
• Blocking services. Block the use of certain Internet services by specific computers on your
network. This feature is described in “Blocking Access to Internet Services” on page 3-3.
• Scheduled blocking. Block sites and services according to a daily schedule. This feature is
described in “Scheduling Blocking” on page 3-5.
• Allow inbound access to your server. To allow inbound access to resources on your local
network (for example, a Web server or remote desktop program), you can open the needed
services by configuring port forwarding as described in “Allowing Inbound Connections To
Your Network” on page 5-1.
• Allow certain games and applications to function correctly. Some games and applications
need to allow additional inbound traffic to function. Port triggering can dynamically allow
additional service connections, as described in “Allowing Inbound Connections To Your
Network” on page 5-1. Another feature to solve application conflicts with the firewall is
Universal Plug and Play (UPnP), described in “Using Universal Plug and Play” on page 5-12.
- NETGEAR RangeMax™ 1
- Dual Band Wireless-N 1
- Router WNDR3300 1
- Reference Manual 1
- WNDR3300 product package 3
- FCC Information to User 4
- FCC Declaration Of Conformity 5
- Contents 7
- About This Manual 11
- How to Use This Manual 12
- How to Print This Manual 12
- Revision History 13
- Chapter 1 15
- Figure 1-1 16
- Figure 1-2 17
- Figure 1-3 17
- Figure 1-4 18
- Figure 1-5 20
- ISP does not require login 20
- Figure 1-6 22
- Figure 1-7 23
- Chapter 2 25
- Safeguarding Your Network 25
- Safeguarding Your Network 2-3 27
- 2-4 Safeguarding Your Network 28
- Safeguarding Your Network 2-5 29
- 2-6 Safeguarding Your Network 30
- Figure 2-2 30
- Safeguarding Your Network 2-7 31
- 2-8 Safeguarding Your Network 32
- Safeguarding Your Network 2-9 33
- Figure 2-3 33
- Wireless Security 34
- Figure 2-4 35
- Figure 2-5 36
- Push Button Configuration 37
- PIN Entry 38
- Configuring the WPS Settings 38
- Figure 2-8 39
- Figure 2-9 41
- Figure 2-10 42
- Backing Up Your Configuration 44
- Understanding Your Firewall 45
- Chapter 3 47
- Figure 3-1 48
- Figure 3-2 49
- Figure 3-3 50
- Scheduling Blocking 51
- Figure 3-5 52
- Field Description 53
- Figure 3-6 54
- Setting the Time 55
- Chapter 4 57
- Configuring a Device Name 58
- Using Address Reservation 60
- Using a Dynamic DNS Service 61
- Figure 4-2 62
- Disabling the SPI Firewall 63
- Setting the MTU Size 64
- Configuring Static Routes 65
- Figure 4-4 66
- Figure 4-5 66
- Chapter 5 69
- Fine-Tuning Your Network 69
- 5-2 Fine-Tuning Your Network 70
- Fine-Tuning Your Network 5-3 71
- 5-4 Fine-Tuning Your Network 72
- Fine-Tuning Your Network 5-5 73
- 5-6 Fine-Tuning Your Network 74
- Adding a Custom Service 75
- 5-8 Fine-Tuning Your Network 76
- Figure 5-2 76
- Configuring Port Triggering 77
- 5-10 Fine-Tuning Your Network 78
- Figure 5-3 78
- Fine-Tuning Your Network 5-11 79
- Figure 5-4 79
- Using Universal Plug and Play 80
- Fine-Tuning Your Network 5-13 81
- 5-14 Fine-Tuning Your Network 82
- Fine-Tuning Your Network 5-15 83
- Figure 5-6 83
- 5-16 Fine-Tuning Your Network 84
- Figure 5-7 84
- Fine-Tuning Your Network 5-17 85
- Figure 5-8 85
- 5-18 Fine-Tuning Your Network 86
- Figure 5-9 86
- Fine-Tuning Your Network 5-19 87
- Figure 5-10 87
- Changing the MTU 88
- Fine-Tuning Your Network 5-21 89
- Table 5-1. Common MTU Sizes 89
- 5-22 Fine-Tuning Your Network 90
- Figure 5-11 90
- Technologies 91
- 5-24 Fine-Tuning Your Network 92
- Chapter 6 93
- Figure 6-1 94
- Figure 6-2 97
- Set Interval 98
- Figure 6-4 99
- Figure 6-5 100
- Upgrading the Router Software 101
- Figure 6-6 102
- Figure 6-7 102
- Figure 6-8 103
- Figure 6-9 105
- Chapter 7 107
- Troubleshooting 107
- 7-2 Troubleshooting 108
- Troubleshooting 7-3 109
- 7-4 Troubleshooting 110
- Troubleshooting 7-5 111
- 7-6 Troubleshooting 112
- Troubleshooting 7-7 113
- Problems with Date and Time 114
- Troubleshooting 7-9 115
- 7-10 Troubleshooting 116
- Troubleshooting 7-11 117
- Figure 7-1 117
- 7-12 Troubleshooting 118
- Figure 7-2 118
- Troubleshooting 7-13 119
- 7-14 Troubleshooting 120
- Appendix A 121
- Technical Specifications 121
- A-2 Technical Specifications 122
- Technical Specifications A-3 123
- A-4 Technical Specifications 124
- Technical Specifications A-5 125
- A-6 Technical Specifications 126
- Appendix B 127
- Related Documents 127
- B-2 Related Documents 128
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