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Reference Manual for the Model DG834GT 108 Mbps Super Wireless ADSL Router
5-8 Protecting Your Network
August 2004
• WAN Users
These settings determine which packets are covered by the rule, based on their source
(WAN) IP address. Select the desired option:
• Any — all IP addresses are covered by this rule.
• Address range — if this option is selected, you must enter the Start and Finish fields.
• Single address — enter the required address in the Start field.
•Log
You can select whether the traffic will be logged. The choices are:
• Never — no log entries will be made for this service.
• Always — any traffic for this service type will be logged.
• Match — traffic of this type which matches the parameters and action will be logged.
• Not match — traffic of this type which does not match the parameters and action will
be logged.
Inbound Rule Example: Allowing Videoconferencing
If you want to allow incoming videoconferencing to be initiated from a restricted range of outside
IP addresses, such as from a branch office, you can create an inbound rule. In the example shown
in Figure 5-6, CU-SeeMe connections are allowed only from a specified range of external IP
addresses. In this case, we have also specified logging of any incoming CU-SeeMe requests that
do not match the allowed parameters.
- Reference Manual for the 1
- Model DG834GT 108 1
- Mbps Super Wireless 1
- ADSL Router 1
- Contents 5
- Chapter 1 13
- About This Guide 13
- How to Use this Manual 14
- How to Print this Manual 15
- 1-4 About This Guide 16
- Chapter 2 17
- Introduction 17
- Key Features 18
- A Powerful, True Firewall 19
- Protocol Support 20
- Content Filtering 21
- What’s in the Box? 22
- Introduction 2-7 23
- The Router’s Rear Panel 24
- Introduction 2-9 25
- 2-10 Introduction 26
- Chapter 3 27
- Ethernet Cabling Requirements 28
- How to Connect the Router 31
- &RPSXWHU 34
- LOG IN TO THE DG834GT 35
- CONNECT TO THE INTERNET 36
- ADSL Settings 46
- Chapter 4 47
- Wireless Configuration 47
- Wireless Data 48
- Security Options 48
- Range: Up to 300 Feet 48
- Wireless Configuration 4-3 49
- 4-4 Wireless Configuration 50
- Wireless Configuration 4-5 51
- Figure 4-3: 108 Mbps Logo 51
- 4-6 Wireless Configuration 52
- Wireless Configuration 4-11 57
- 4-12 Wireless Configuration 58
- How to Configure WEP 59
- How to Configure WPA-PSK 60
- Chapter 5 61
- Protecting Your Network 61
- Protecting Your Network 5-3 63
- Firewall Rules 65
- 5-6 Protecting Your Network 66
- Protecting Your Network 5-7 67
- Figure 5-5: Rule example: 67
- 5-8 Protecting Your Network 68
- Protecting Your Network 5-9 69
- 5-10 Protecting Your Network 70
- Order of Precedence for Rules 71
- Services 72
- How to Define Services 73
- How to Set Your Time Zone 74
- 5-16 Protecting Your Network 76
- Chapter 6 77
- Managing Your Network 77
- 6-4 Managing Your Network 80
- Managing Your Network 6-5 81
- Figure 6-6 82
- Managing Your Network 6-7 83
- 6-8 Managing Your Network 84
- Viewing Attached Devices 85
- 6-10 Managing Your Network 86
- Managing Your Network 6-11 87
- Examples of Log Messages 88
- Managing Your Network 6-13 89
- Figure 6-9: E-mail menu 89
- 6-14 Managing Your Network 90
- Enabling Remote Management 91
- 6-16 Managing Your Network 92
- Chapter 7 93
- Advanced Configuration 93
- Configuring LAN IP Settings 95
- 7-4 Advanced Configuration 96
- Advanced Configuration 7-5 97
- Configuring Dynamic DNS 99
- How to Configure Dynamic DNS 100
- Using Static Routes 101
- 7-12 Advanced Configuration 104
- August 2004 104
- Troubleshooting 105
- Chapter 8 105
- Power LED Not On 106
- LAN or WAN Port LEDs Not On 106
- Troubleshooting 8-3 107
- ADSL link 108
- Obtaining a WAN IP Address 109
- Request timed out 111
- 8-8 Troubleshooting 112
- Problems with Date and Time 113
- 8-10 Troubleshooting 114
- Appendix A 115
- Technical Specifications 115
- A-2 Technical Specifications 116
- Electromagnetic Emissions 116
- Interface Specifications 116
- Appendix B 117
- Network and Routing Basics 117
- Routing Information Protocol 118
- IP Addresses and the Internet 118
- Subnet Addressing 120
- Table 8-2. Netmask Formats 122
- Private IP Addresses 123
- Related Documents 125
- Domain Name Server 125
- IP Configuration by DHCP 125
- What is a Firewall? 126
- Stateful Packet Inspection 126
- Ethernet Cabling 127
- Inside Twisted Pair Cables 128
- Appendix C 131
- Preparing Your Network 131
- C-2 Preparing Your Network 132
- Windows 95B, 98, and Me 134
- Preparing Your Network C-5 135
- Verifying TCP/IP Properties 136
- Preparing Your Network C-7 137
- C-8 Preparing Your Network 138
- Preparing Your Network C-9 139
- C-10 Preparing Your Network 140
- Preparing Your Network C-11 141
- C-12 Preparing Your Network 142
- Preparing Your Network C-13 143
- Properties button 144
- 3. Type ipconfig /all 145
- MacOS 8.6 or 9.x 146
- 4. Click Save 147
- Are Login Protocols Used? 148
- 4. Select the IP Address tab 149
- 5. Select the Gateway tab 149
- Computers 150
- Restarting the Network 151
- C-22 Preparing Your Network 152
- Appendix D 153
- Wireless Networking Basics 153
- 802.11 Authentication 155
- Open System Authentication 155
- Shared Key Authentication 156
- Overview of WEP Parameters 157
- Key Size 158
- Wireless Channels 159
- WPA Wireless Security 160
- How Does WPA Compare to WEP? 161
- Wired Network with Optional 164
- 802.1x Port Based Network 164
- Access Control 164
- Wireless LAN 164
- Is WPA Perfect? 168
- Product Support for WPA 168
- Glossary 171
- -6 Glossary 176
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