Netgear DG824M User Manual Page 89
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Reference Manual for the Model DG824M Wireless ADSL Modem Gateway
Advanced Configuration 6-5
Any packets sent through the gateway that are larger than the configured MTU size will be
repackaged into smaller packets to meet the MTU requirement. To change the MTU size:
1. Under MTU Size, select Custom.
2. Enter a new size between 64 and 1500. For PPPoE, use 1492.
3. Click Apply to save the new configuration.
DHCP
By default, the gateway will function as a DHCP (Dynamic Host Configuration Protocol) server,
allowing it to assign IP, DNS server, and default gateway addresses to all computers connected to
the router's LAN. The assigned default gateway address is the LAN address of the gateway. IP
addresses will be assigned to the attached PCs from a pool of addresses specified in this menu.
Each pool address is tested before it is assigned to avoid duplicate addresses on the LAN.
For most applications, the default DHCP and TCP/IP settings of the gateway are satisfactory. See
“IP Configuration by DHCP“ on page B-10” for an explanation of DHCP and information about
how to assign IP addresses for your network.
Use Gateway as DHCP server
If another device on your network will be the DHCP server, or if you will manually configure the
network settings of all of your computers, clear the ‘Use router as DHCP server’ check box.
Otherwise, leave it checked.
Specify the pool of IP addresses to be assigned by setting the Starting IP Address and Ending IP
Address. These addresses should be part of the same IP address subnet as the gateway’s LAN IP
address. Using the default addressing scheme, you should define a range between 192.168.0.2 and
192.168.0.253, although you may wish to save part of the range for devices with fixed addresses.
The gateway will deliver the following parameters to any LAN device that requests DHCP:
• An IP Address from the range you have defined
• Subnet Mask
• Gateway IP Address is the gateway’s LAN IP address
• Primary DNS Server, if you entered a Primary DNS address in the Basic Settings menu;
otherwise, the gateway’s LAN IP address
• Secondary DNS Server, if you entered a Secondary DNS address in the Basic Settings menu
- Reference Manual for the 1
- Model DG824M Wireless 1
- ADSL Modem Gateway 1
- Contents 5
- List of Procedures 11
- Preface 13
- About This Guide 13
- Typographical Conventions 14
- Special Message Formats 14
- Chapter 1 15
- Introduction 15
- A Powerful, True Firewall 16
- Content Filtering 17
- Protocol Support 17
- 1-4 Introduction 18
- Introduction 1-5 19
- What’s in the Box? 20
- Introduction 1-7 21
- Table 1-1. LED Descriptions 21
- The Gateway’s Rear Panel 22
- Chapter 2 23
- Your LAN 27
- Chapter 3 43
- Wireless Configuration 43
- Wireless Settings 44
- Wireless Configuration 3-3 45
- 3-6 Wireless Configuration 48
- Figure 3-3. Wireless WEP menu 48
- Wireless Configuration 3-7 49
- Generate button 50
- Chapter 4 51
- Protecting Your Network 51
- Protecting Your Network 4-3 53
- Protecting Your Network 4-5 55
- 4-6 Protecting Your Network 56
- Figure 4-4: Rules menu 56
- Protecting Your Network 4-7 57
- 4-8 Protecting Your Network 58
- Protecting Your Network 4-9 59
- 4-10 Protecting Your Network 60
- Protecting Your Network 4-11 61
- Order of Precedence for Rules 62
- Services 63
- Chapter 5 67
- Managing Your Network 67
- Figure 5-1 68
- Managing Your Network 5-5 71
- 5-6 Managing Your Network 72
- Managing Your Network 5-7 73
- Figure 5-5 below: 74
- Viewing Attached Devices 75
- 5-10 Managing Your Network 76
- Managing Your Network 5-11 77
- Examples of log messages 78
- Managing Your Network 5-13 79
- 5-14 Managing Your Network 80
- Managing Your Network 5-15 81
- Figure 5-9: Diagnostics menu 81
- Enabling Remote Management 82
- Managing Your Network 5-17 83
- 5-18 Managing Your Network 84
- Chapter 6 85
- Advanced Configuration 85
- Configuring LAN IP Settings 87
- 6-4 Advanced Configuration 88
- Configuring Dynamic DNS 91
- Using Static Routes 93
- 6-12 Advanced Configuration 96
- Chapter 7 97
- Troubleshooting 97
- Power LED Not On 98
- LAN or WAN Port LEDs Not On 98
- Troubleshooting 7-3 99
- ADSL link 100
- Obtaining a WAN IP Address 101
- Request timed out 103
- 7-8 Troubleshooting 104
- Problems with Date and Time 105
- 7-10 Troubleshooting 106
- Appendix A 107
- Technical Specifications 107
- A-2 Technical Specifications 108
- Electromagnetic Emissions 108
- Interface Specifications 108
- Appendix B 109
- Network and Routing Basics 109
- What is a Router? 110
- Routing Information Protocol 110
- IP Addresses and the Internet 110
- 192.0.1.x to 223.255.254.x 112
- Subnet Addressing 113
- Table 7-2. Netmask Formats 114
- Private IP Addresses 115
- Related Documents 117
- Domain Name Server 118
- IP Configuration by DHCP 118
- Ethernet Cabling 119
- Cable Quality 120
- What is a Firewall? 120
- Wireless Networking 121
- Wireless Channel Selection 123
- Appendix C 125
- Preparing Your Network 125
- C-2 Preparing Your Network 126
- Windows 95B, 98, and Me 128
- Preparing Your Network C-5 129
- Verifying TCP/IP Properties 130
- Preparing Your Network C-7 131
- C-8 Preparing Your Network 132
- Preparing Your Network C-9 133
- C-10 Preparing Your Network 134
- Preparing Your Network C-11 135
- C-12 Preparing Your Network 136
- Preparing Your Network C-13 137
- Properties button 138
- 3. Type ipconfig /all 139
- MacOS 8.6 or 9.x 140
- 4. Click Save 141
- Are Login Protocols Used? 142
- 4. Select the IP Address tab 143
- 5. Select the Gateway tab 143
- Computers 144
- Restarting the Network 145
- C-22 Preparing Your Network 146
- Glossary 147
- 2 Glossary 148
- 4 Glossary 150
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