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DG834GUv5 Wireless Router with Built-in DSL Modem User Manual
3-6 Protecting Your Network
v1.0, May 2009
Inbound Rules (Port Forwarding)
Because the modem router uses Network Address Translation (NAT), your network presents only
one IP address to the Internet, and outside users cannot directly access any of your local
computers. However, by defining an inbound rule you can make a local server (for example, a Web
server or game server) visible and available to the Internet. The rule tells the modem router to
direct inbound traffic for a particular service to one local server based on the destination port
number. This is also known as port forwarding.
Remember that allowing inbound services opens holes in your firewall. Enable only those ports
that are necessary for your network. Following are two application examples of inbound rules.
Inbound Rule Example: A Local Public Web Server
If you host a public Web server on your local network, you can define a rule to allow inbound Web
(HTTP) requests from outside IP addresses to the IP address of your Web server at any time of day.
This rule is shown in the following figure:
The settings are:
• Service. From this list, select the application or service to be allowed or blocked. The list
already displays many common services, but you are not limited to these choices. Use the
Services screen to add any additional services or applications that do not already appear.
Note: Some broadband ISP accounts do not allow you to run any server processes (such
as a Web or FTP server) from your location. Your ISP might periodically check for
servers and might suspend your account if it discovers any active services at your
location. If you are unsure, see the acceptable use policy of your ISP.
Figure 3-4
- DG834GUv5 Wireless 1
- Router with Built-in DSL 1
- Modem User Manual 1
- FCC Statement 2
- Customer Support 5
- Contents 7
- About This Manual 11
- How to Use This Manual 12
- How to Print this Manual 12
- Chapter 1 15
- Figure 1-1 17
- Figure 1-2 17
- Figure 1-3 18
- Changing Your ADSL Settings 21
- Chapter 2 23
- Wireless Security Options 25
- Figure 2-2 27
- Table 2-1. Wireless Settings 28
- Figure 2-3 30
- –9, a–f, or A–F) 31
- Figure 2-4 33
- Figure 2-5 34
- Figure 2-6 35
- Figure 2-7 37
- Figure 2-8 38
- Figure 2-9 39
- Chapter 3 41
- Protecting Your Network 41
- 3-2 Protecting Your Network 42
- Figure 3-1 42
- Blocking Keywords and Sites 43
- 3-4 Protecting Your Network 44
- Firewall Rules 45
- 3-6 Protecting Your Network 46
- Figure 3-4 46
- Protecting Your Network 3-7 47
- Figure 3-5 47
- 3-8 Protecting Your Network 48
- Protecting Your Network 3-9 49
- Figure 3-6 49
- Services 50
- Protecting Your Network 3-11 51
- Figure 3-8 51
- Figure 3-9 51
- 3-12 Protecting Your Network 52
- Figure 3-10 52
- Scheduling Firewall Services 53
- 3-14 Protecting Your Network 54
- Chapter 4 55
- Managing Your Network 55
- Erasing the Configuration 56
- Managing Your Network 4-3 57
- Figure 4-2 57
- 4-4 Managing Your Network 58
- Figure 4-3 58
- Managing Your Network 4-5 59
- Viewing Statistics 60
- Viewing Connection Status 61
- Viewing Attached Devices 62
- Managing Your Network 4-9 63
- Figure 4-7 63
- 4-10 Managing Your Network 64
- Log Message Examples 65
- 4-12 Managing Your Network 66
- Figure 4-8 66
- Managing Your Network 4-13 67
- Enabling Remote Management 68
- Managing Your Network 4-15 69
- Figure 4-10 69
- 4-16 Managing Your Network 70
- Chapter 5 71
- Advanced Configuration 71
- 5-2 Advanced Configuration 72
- Figure 5-1 72
- Advanced Configuration 5-3 73
- 5-4 Advanced Configuration 74
- Figure 5-2 74
- Advanced Configuration 5-5 75
- Table 5-2. LAN IP Setup 75
- 5-6 Advanced Configuration 76
- Advanced Configuration 5-7 77
- Configuring Dynamic DNS 78
- Using Static Routes 79
- Configuring Static Routes 80
- Advanced Configuration 5-11 81
- Figure 5-5 81
- 5-12 Advanced Configuration 82
- Figure 5-6 82
- Advanced Configuration 5-13 83
- Figure 5-7 83
- 5-14 Advanced Configuration 84
- Figure 5-8 84
- Advanced Configuration 5-15 85
- Figure 5-9 85
- 5-16 Advanced Configuration 86
- DG834GUv5 Modem Router 87
- 5-18 Advanced Configuration 88
- Chapter 6 89
- Configuring Telkom VPN Lite 89
- Figure 6-1 90
- Figure 6-2 90
- Webpage: 91
- Figure 6-5 92
- Chapter 7 93
- Troubleshooting 93
- Power LED Is Not On 94
- Power LED Is Red 94
- ADSL Link 95
- Obtaining a WAN IP Address 97
- 7-6 Troubleshooting 98
- Troubleshooting 7-7 99
- 7-8 Troubleshooting 100
- Problems with Date and Time 101
- 7-10 Troubleshooting 102
- Chapter 8 103
- Figure 8-5: Router USB Port 108
- USB Drive Requirements 109
- Unmounting a USB Drive 112
- Appendix A 117
- Technical Specifications 117
- A-2 Technical Specifications 118
- Related Documents 119
- AppendixB 119
- C-2 Related Documents 120
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