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Reference Manual for the Model DG834 ADSL Firewall Router
B-6 Network and Routing Basics
The following table lists the additional subnet mask bits in dotted-decimal notation. To use the
table, write down the original class netmask and replace the 0 value octets with the dotted-decimal
value of the additional subnet bits. For example, to partition your Class C network with subnet
mask 255.255.255.0 into 16 subnets (4 bits), the new subnet mask becomes 255.255.255.240.
The following table displays several common netmask values in both the dotted-decimal and the
masklength formats.
Table 7-1. Netmask Notation Translation Table for One Octet
Number of Bits Dotted-Decimal Value
1 128
2 192
3 224
4 240
5 248
6 252
7 254
8 255
Table 7-2. Netmask Formats
Dotted-Decimal Masklength
255.0.0.0 /8
255.255.0.0 /16
255.255.255.0 /24
255.255.255.128 /25
255.255.255.192 /26
255.255.255.224 /27
255.255.255.240 /28
255.255.255.248 /29
255.255.255.252 /30
255.255.255.254 /31
255.255.255.255 /32
- Reference Manual for the 1
- Model DG834 ADSL 1
- Firewall Router 1
- Contents 5
- Chapter 1 11
- About This Guide 11
- How to Use this Manual 12
- How to Print this Manual 13
- 1-4 About This Guide 14
- Chapter 2 15
- Introduction 15
- Key Features 16
- Protocol Support 17
- 2-4 Introduction 18
- What’s in the Box? 19
- ADSL Firewall Router DG834 20
- 2-8 Introduction 22
- Chapter 3 23
- Ethernet Cabling Requirements 24
- How to Connect the Router 27
- '6/ 28
- LOG IN TO THE DG834 30
- CONNECT TO THE INTERNET 31
- ISP Does Not Require Login 37
- ISP Does Require Login 37
- ADSL Settings 41
- Chapter 4 43
- Protecting Your Network 43
- Protecting Your Network 4-3 45
- Firewall Rules 47
- 4-6 Protecting Your Network 48
- Protecting Your Network 4-7 49
- 4-8 Protecting Your Network 50
- Protecting Your Network 4-9 51
- 4-10 Protecting Your Network 52
- Protecting Your Network 4-11 53
- Services 54
- How to Define Services 55
- How to Set Your Time Zone 56
- 4-16 Protecting Your Network 58
- Chapter 5 59
- Managing Your Network 59
- 5-4 Managing Your Network 62
- Managing Your Network 5-5 63
- 5-6 Managing Your Network 64
- Figure 5-6 65
- 5-8 Managing Your Network 66
- Viewing Attached Devices 67
- 5-10 Managing Your Network 68
- Managing Your Network 5-11 69
- Examples of Log Messages 70
- Managing Your Network 5-13 71
- Enabling Remote Management 72
- Configuring Remote Management 73
- 5-16 Managing Your Network 74
- Chapter 6 75
- Advanced Configuration 75
- Configuring LAN IP Settings 77
- 6-4 Advanced Configuration 78
- Advanced Configuration 6-5 79
- Configuring Dynamic DNS 81
- How to Configure Dynamic DNS 82
- Using Static Routes 83
- 6-12 Advanced Configuration 86
- Chapter 7 87
- Troubleshooting 87
- Power LED Not On 88
- LAN or WAN Port LEDs Not On 88
- Troubleshooting 7-3 89
- ADSL link 90
- Obtaining a WAN IP Address 91
- Request timed out 93
- 7-8 Troubleshooting 94
- Problems with Date and Time 95
- 7-10 Troubleshooting 96
- Appendix A 97
- Technical Specifications 97
- T1.413, G.DMT, G.Lite 98
- ITU Annex A or B 98
- Appendix B 99
- Network and Routing Basics 99
- Routing Information Protocol 100
- IP Addresses and the Internet 100
- Subnet Addressing 102
- Network Subnet Node 103
- Table 7-2. Netmask Formats 104
- Private IP Addresses 105
- Related Documents 107
- Domain Name Server 107
- IP Configuration by DHCP 108
- Ethernet Cabling 109
- Category 5 Cable Quality 110
- Inside Twisted Pair Cables 111
- Appendix C 115
- Preparing Your Network 115
- C-2 Preparing Your Network 116
- Windows 95B, 98, and Me 118
- Preparing Your Network C-5 119
- Verifying TCP/IP Properties 120
- Preparing Your Network C-7 121
- C-8 Preparing Your Network 122
- Preparing Your Network C-9 123
- C-10 Preparing Your Network 124
- Preparing Your Network C-11 125
- C-12 Preparing Your Network 126
- Preparing Your Network C-13 127
- Properties button 128
- 3. Type ipconfig /all 129
- MacOS 8.6 or 9.x 130
- 4. Click Save 131
- Are Login Protocols Used? 132
- 4. Select the IP Address tab 133
- 5. Select the Gateway tab 133
- Computers 134
- Restarting the Network 135
- C-22 Preparing Your Network 136
- Glossary 137
- 2 Glossary 138
- 4 Glossary 140
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