Motorola SURFboard SBG940 User Manual Page 19
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13 SBG940 User Guide
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Configuration: Basic Gateway TCP/IP Wireless USB
DMZ
A de-militarized zone (DMZ) is one or more computers logically located outside the firewall between an SBG940
LAN and the Internet. A DMZ prevents direct access by outside users to private data.
For example, you can set up a web server on a DMZ computer to enable outside users to access your website
without exposing confidential data on your network.
A DMZ can also be useful to play interactive games that may have a problem running through a firewall. You can
leave a computer used for gaming only exposed to the Internet while protecting the rest of your network. For more
information, see “Gaming Configuration Guidelines”.
Port Triggering
When you run an application that accesses the Internet, it typically initiates communications with a computer on
the Internet. For some applications, especially gaming, the computer on the Internet also initiates communications
with your computer. Because NAT does not normally allow these incoming connections:
• The SBG940 has preconfigured port triggers for common applications.
• If needed, you can configure additional port triggers on the Gateway > PORT TRIGGERS — custom Page.
Wireless Security
Because WLAN data is transmitted using radio signals, it may be possible an unauthorized person to access your
WLAN unless you prevent them from doing so. To prevent unauthorized eavesdropping of data transmitted over
your LAN, you must enable wireless security. The default SBG940 settings neither provide security for
transmitted data nor protect network data from unauthorized intrusions.
The SBG940 provides the following wireless security measures, which are described in “Setting Up Your Wireless
LAN”:
• To prevent unauthorized eavesdropping, you must encrypt data transmitted over the wireless interface using
one of:
— If all of your wireless clients support Wi-Fi
®
Protected Access (WPA) encryption, we recommend using
WPA (see “Configuring WPA on the SBG940” and “Configuring a Wireless Client for WPA”).
— Otherwise, configure a Wired Equivalency Privacy (WEP) key on the SBG940 and each WLAN client
(see “Configuring WEP on the SBG940” and “Configuring a Wireless Client for WEP”).
• To protect LAN data from unauthorized intrusions, you can restrict WLAN access to computers having one or
both of:
— Known MAC addresses (see “Configuring a MAC Access Control List on the SBG940”)
— The same unique network name (ESSID) as the SBG940 (see “Configuring the Wireless Network Name
on the SBG940” and “Configuring a Wireless Client with the Network Name (ESSID)”)
Restricting access to computers having the same network name is also called “disabling ESSID broadcasting” or
“enabling closed network operation.”
- User Guide 1
- Contents 5
- Overview 7
- Easy Setup 8
- Network Connection Types 8
- Sample Hybrid LAN 9
- Optional Accessories 10
- Front Panel 11
- Rear Panel 12
- SBG940 LAN Choices 13
- Wireless LAN 14
- Wired Ethernet LAN 15
- 10 SBG940 User Guide 16
- USB Connection 17
- Caution! 17
- Security 18
- 13 SBG940 User Guide 19
- Port Forwarding 20
- Virtual Private Networks 20
- Related Documentation 20
- Installation 21
- Precautions 22
- Signing Up for Service 22
- Computer System Requirements 23
- Cabling the LAN 24
- Wall Mounting 27
- 22 SBG940 User Guide 28
- Wall Mounting Template 29
- Basic Configuration 30
- 25 SBG940 User Guide 31
- 26 SBG940 User Guide 32
- Click To Perform 32
- Changing the Default Password 33
- Enabling Remote Access 34
- Getting Help 35
- Setting the Firewall Policy 36
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- 33 SBG940 User Guide 39
- Field Description 39
- 34 SBG940 User Guide 40
- Field or Button Description 40
- 35 SBG940 User Guide 41
- Firewall > LOGS Page 42
- Configuring Port Triggers 43
- • DirectX 7 and DirectX 8 43
- • MSN Games by Zone.com 43
- • Battle.net 43
- Configuring a Gaming DMZ Host 44
- • The use of random ports 44
- Configuring the Gateway 45
- Gateway > STATUS Page 46
- Gateway > WAN Page 47
- 42 SBG940 User Guide 48
- 43 SBG940 User Guide 49
- CAUTION! 50
- 45 SBG940 User Guide 51
- 46 SBG940 User Guide 52
- 47 SBG940 User Guide 53
- • The application port number 54
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- 50 SBG940 User Guide 56
- Gateway > LOG Page 57
- Configuring TCP/IP 58
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- 61 SBG940 User Guide 67
- 62 SBG940 User Guide 68
- 64 SBG940 User Guide 70
- 65 SBG940 User Guide 71
- Setting Up Your Wireless LAN 72
- • Is much easier to configure 73
- Configuring WPA on the SBG940 74
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- 8 Click Save Changes 75
- Configuring WEP on the SBG940 76
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- • Wireless > STATUS Page 84
- • Wireless > NETWORK Page 84
- Wireless > STATUS Page 85
- Wireless > NETWORK Page 86
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- 83 SBG940 User Guide 89
- Wireless > STATISTICS page 90
- 85 SBG940 User Guide 91
- Setting Up a USB Driver 92
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- 6 Click Next 98
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- SBG940 User Guide 101
- ExitPrint 101
- 96 SBG940 User Guide 102
- Click Settings 104
- Click the Hardware tab: 104
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- 102 SBG940 User Guide 108
- 105 SBG940 User Guide 111
- Troubleshooting 112
- 107 SBG940 User Guide 113
- Contact Us 114
- Frequently-Asked Questions 115
- Specifications 117
- 112 SBG940 User Guide 118
- Glossary 119
- 114 SBG940 User Guide 120
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- printed 129
- 124 SBG940 User Guide 130
- 125 SBG940 User Guide 131
- 126 SBG940 User Guide 132
- 127 SBG940 User Guide 133
- 128 SBG940 User Guide 134
- 129 SBG940 User Guide 135
- but at much lower cost 136
- Software License 137
- Visit our website at: 138
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