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Motorola SBG941

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User Guide

Motorola SURFboard

SBG941 Series Wireless Cable Modem Gateways*
*SBG941 SBG941U SBG941E SBG941UE
Safety and Regulatory Information
IMPORTANT SAFETY INSTRUCTIONS
Read This Before You Begin When using your equipment, basic safety precautions should always be followed to reduce the risk of fire, electric shock, and injury to persons, including the following: Read all of the instructions listed here and/or in the user manual before you operate this device. Give particular attention to all safety precautions. Retain the instructions for future reference. This device must be installed and used in strict accordance with manufacturers instructions, as described in the user documentation that is included with the device. Comply with all warning and caution statements in the instructions. Observe all warning and caution symbols that are affixed to this device. To prevent fire or shock hazard, do not expose this device to rain or moisture. The device must not be exposed to dripping or splashing. Do not place objects filled with liquids, such as vases, on the device. This device was qualified under test conditions that included the use of the supplied cables between system components. To ensure regulatory and safety compliance, use only the provided power and interface cables and install them properly.
Different types of cord sets may be used for connections to the main supply circuit. Use only a main line cord that
complies with all applicable device safety requirements of the country of use.
Installation of this device must be in accordance with national wiring codes and conform to local regulations. Operate this device only from the type of power source indicated on the devices marking label. If you are not sure of
the type of power supplied to your home, consult your dealer or local power company.
Do not overload outlets or extension cords, as this can result in a risk of fire or electric shock. Overloaded AC outlets,
extension cords, frayed power cords, damaged or cracked wire insulation, and broken plugs are dangerous. They may result in a shock or fire hazard.
Route power supply cords so that they are not likely to be walked on or pinched by items placed upon or against
them. Pay particular attention to cords where they are attached to plugs and convenience receptacles, and examine the point where they exit from the device. Place this device in a location that is close enough to an electrical outlet to accommodate the length of the power cord. Place the device to allow for easy access when disconnecting the power cord of the device from the AC wall outlet.
Do not connect the plug into an extension cord, receptacle, or other outlet unless the plug can be fully inserted with
no part of the blades exposed.
Place this device on a stable surface. Postpone installation until there is no risk of thunderstorm or lightning activity in the area. It is recommended that the customer install an AC surge protector in the AC outlet to which this device is connected.
This is to avoid damaging the device by local lightning strikes and other electrical surges.
Do not cover the device or block the airflow to the device with any other objects. Keep the device away from
excessive heat and humidity and keep the device free from vibration and dust.
Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a
Wipe the device with a clean, dry cloth. Never use cleaning fluid or similar chemicals. Do not spray cleaners directly
on the device or use forced air to remove dust.
Do not use this product near water: for example, near a bathtub, washbowl, kitchen sink or laundry tub, in a wet
basement, or near a swimming pool.
Upon completion of any service or repairs to this device, ask the service technician to perform safety checks to
determine that the device is in safe operating condition.
Do not open the device. Do not perform any servicing other than that contained in the installation and
troubleshooting instructions. Refer all servicing to qualified service personnel.
This device should not be used in an environment that exceeds 40 C.

SAVE THESE INSTRUCTIONS

Note to CATV System Installer: This reminder is provided to call the CATV system installers attention to Section 820.93 of the National Electric Code, which provides guidelines for proper grounding and, in particular, specifies that the coaxial cable shield shall be connected to the grounding system of the building, as close to the point of cable entry as practical.

WIRELESS LAN INFORMATION

This device is a wireless network product that uses Direct Sequence Spread Spectrum (DSSS) and Orthogonal Frequency-Division Multiple Access (OFDMA) radio technologies. The device is designed to be interoperable with any other wireless DSSS and OFDMA products that comply with:

The IEEE 802.11 Standard on Wireless LANs (Revision B and Revision G), as defined and approved by the Institute of
Electrical and Electronics Engineers.
The Wireless Fidelity (Wi-Fi) certification as defined by the Wireless Ethernet Compatibility Alliance (WECA).
RESTRICTIONS ON THE USE OF WIRELESS DEVICES
In some situations or environments, the use of wireless devices may be restricted by the proprietor of the building or responsible representatives of the organization. For example, using wireless equipment in any environment where the risk of interference to other devices or services is perceived or identified as harmful. If you are uncertain of the applicable policy for the use of wireless equipment in a specific organization or environment, you are encouraged to ask for authorization to use the device prior to turning on the equipment. The manufacturer is not responsible for any radio or television interference caused by unauthorized modification of the devices included with this product, or the substitution or attachment of connecting cables and equipment other than specified by the manufacturer. Correction of the interference caused by such unauthorized modification, substitution, or attachment is the responsibility of the user. The manufacturer and its authorized resellers or distributors are not liable for any damage or violation of government regulations that may arise from failing to comply with these guidelines. SECURITY WARNING: This device allows you to create a wireless network. Wireless network connections may be accessible by unauthorized users. For more information on how to protect your network, see Setting Up Your Wireless LAN or visit the Motorola website.
FCC STATEMENTS FCC INTERFERENCE STATEMENT
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the device off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna. Increase the separation between the device and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.

Product Overview Front Panel Overview Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 3
6 WIRELESS Green: Wi-Fi enabled with encrypted wireless data activity. Long/short flash indicates mobile pairing in progress. Amber: Wi-Fi enabled with unencrypted wireless data activity. Not applicable LED does not flash Green: Wireless pairing successfully established between the SBG941 and another Wi-Fi enabled device on your network printer, PDA, laptop, etc. Amber: Mobile pairing was successful. LED turns green after five minutes. Green: WPS button is pressed and Wi-Fi Protected Security is activated. LED will remain on until WPS button is released.

7 WPS START

Rear Panel Overview
Both the SBG941 and SBG941U (shown above) rear panels contain the following cabling port and connectors:
Item 1 ETHERNET Description Ethernet-ports: Activity LED Green LED defines the activity of the Ethernet connector LED is ON Indicates a 100Base-T negotiated data rate LED is FLASHING Indicates activity is detected on the port LED is OFF Indicates the unit is not powered or there is no 100BaseT Ethernet connection
Product Overview Rear Panel Overview Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 4
ETHERNET (continued) 10/100 LED Indicates the connection data rate Green LED is ON Indicates a 100Base-T data connection Amber LED is ON Indicates a 10Base-T negotiated data rate Amber LED is FLASHING Indicates there is activity on the Ethernet connection when in 10Base-T rate Amber LED is OFF Indicates the device is not powered on or there is no 10Base-T connection For Windows only, used for connecting a PC to the SBG941U. You cannot connect a Macintosh or UNIX computer to the USB port on the SBG941U. Front panel LINK LED will turn ON when a USB device is connected and a link is established USB connector is available on SBG941U models only. Coaxial cable connector Resets the cable modem which may take from five to 30 minutes +12VDC power connector

CABLE RESET POWER

MAC Label Overview
The SBG941 Media Access Control (MAC) label contains the MAC address which is a unique, 48-bit value that identifies each Ethernet network device. To receive data service, you need to provide the MAC address marked HFC MAC ID to your Internet Service provider.

4. Select Properties from the drop-down menu to display the Local Area Connection Properties window. Be sure Internet Protocol (TCP/IP) is checked. 5. Select Internet Protocol (TCP/IP) and click Properties to display the Internet Protocol (TCP/IP) Properties window. 6. Select Obtain an IP address automatically and Obtain DNS server address automatically. 7. Click OK to save the TCP/IP settings and exit the TCP/IP Properties window. 8. Close the Local Area Connection Properties window and then exit the Control Panel. 9. When you complete the TCP/IP configuration, go to Verifying the IP Address in Windows XP.
Configuring TCP/IP in Windows Vista
1. Open the Control Panel. 2. Double-click Network and Internet to display the Network and Internet window. 3. Double-click Network and Sharing Center to display the Network and Sharing Center window. 4. Click Manage network connections to display the LAN or High-Speed Internet connections window. 5. Right-click the network connection for your network interface. 6. Select Properties to display the Local Area Connection Properties window. Vista may prompt you to allow access to the Network Properties Options. If you see the prompt, User Account Control -- Windows needs your permission to continue, click Continue. 7. Select Internet Protocol Version 4 or 6 (TCP/IPv4 or v6) and click Properties to display the Internet Protocol Properties window. 8. Select Obtain an IP address automatically and Obtain DNS server address automatically. 9. Click OK to save the TCP/IP settings and close the Internet Protocol Version 4 (TCP/IPv4) Properties window. 10. Click OK to close the Local Area Connection Properties window. 11. Close the remaining windows and exit the Control Panel. 12. When you complete the TCP/IP configuration, go to Verifying the IP Address in Windows Vista.
Installing the Modem Connecting to the Internet Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 9
Verifying the IP Address in Windows XP
To check the IP address: 1. On the Windows Desktop, click Start. 2. Select Run. The Run window is displayed. 3. Type cmd and click OK. 4. Type ipconfig and press ENTER to display your IP configuration. If an Autoconfiguration IP address is displayed, that indicates possible broadband network problems or an improper connection between your computer and the SBG941. The Autoconfiguration IP address, ranging from 169.254.0.0 to 169.254.255.255, is reserved for Automatic Private IP Addressing (APIPA). This can occur if the modem is configured to automatically obtain an IP address from a Dynamic Host Configuration Protocol (DHCP) server. When Auto-configuration is enabled, Windows will automatically assign an IP address if the cable modem gateway is unable to obtain one. Because this automatically assigned IP address is not valid, you will not be able to access the Internet using the cable modem gateway. Check the following:

Your cable connections Whether you can see cable-TV channels on your television
After successfully verifying your cable connections and proper cable-TV operation, you can renew your IP address.
Verifying the IP Address in Windows Vista
Do the following to verify the IP address: 1. On the Windows Desktop, click Start. 2. Click All Programs. 3. Click Accessories. 4. Click Run to display the Run window. 5. Type cmd and click OK to open a command prompt window. 6. Type ipconfig and press ENTER to display the IP Configuration. If an Auto-configuration IP address is displayed, that indicates possible broadband network problems or an improper connection between your computer and the SBG941. The Auto-configuration IP address, ranging from 169.254.0.0 to 169.254.255.255, is reserved for Automatic Private IP Addressing (APIPA).
Installing the Modem Connecting to the Internet Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 10
Renewing Your IP Address in Windows XP or Windows Vista
1. Open a command prompt window. A. From the Windows Taskbar, click Start to open the Start menu. B. Select Run to open the Run window. C. Type cmd in the Open entry box and click OK. 2. Type ipconfig /renew and press ENTER. A valid IP address should appear indicating that Internet access is available. 3. Type exit and press ENTER to close the command prompt window. If, after performing this procedure, your computer cannot access the Internet, call your cable provider for help.
Setting Up a Wi-Fi Network
Do the following to set up a Wi-Fi network using the WPS button on the modem: 1. If necessary, power on the modem. 2. Power on the WPS-enabled devices you want to have access to the network, such as a PC or router. The Wi-Fi network will automatically detect the WPS devices. 3. Press WPS button on the modem. 4. If applicable, press WPS button on the other WPS devices.

Wall Mounting the Modem

If you choose to wall mount the modem, do the following before starting:
Locate the unit as specified by the local or national codes governing residential or business cable TV and communications services. Follow all local standards for installing a network interface unit/network interface device (NIU/NID). Make sure the AC power plug is disconnected from the wall outlet and all cables are removed from the back of the modem before starting the installation. Determine if you are mounting the modem horizontally or vertically. Use M3.5 x 38 mm (#6 x 1 inch) screws with a flat underside and maximum screw head diameter of 9.0 mm to mount the modem. See the screw mounting dimensions below to properly mount the modem:

Basic Configuration Gaming Configuration Guidelines Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 18
To configure a gaming DMZ device, on the Basic DHCP Page: 1. Reserve a private IP address for the computer or game device MAC address. 2. Designate the device as a DMZ device. You can reserve IP addresses for multiple devices, but only one device at a time can be designated as the gaming DMZ.
Exiting the SBG941 Configuration Manager
To logoff and close the SBG941 Configuration Manager, click Logout on the SBG941 Menu Options bar.
Basic Configuration Exiting the SBG941 Configuration Manager Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 19

Status Pages

The SBG941 Status pages provide information about the SBG941 hardware and software, MAC address, cable modem IP address, serial number, and related information. You can also monitor your cable system connection. Additional pages provide diagnostic tools and allow you to change your SBG941 user name and password. You can click any Status submenu option to view or change the status information for that option.

Status Software Page

This page displays information about the hardware version, software version, MAC address, cable modem IP address, serial number, system up time, and network registration status.
Status Pages Status Software Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 20

Status Connection Page

This page provides the HFC and IP network connectivity status of the SBG941 cable modem. You can click the Refresh button in your web browser to refresh the information on this page at any time.
Field Descriptions for the Status Connection Page
Field Startup Procedure Downstream Channel Description Startup status information about the cable modem. Status information about the RF downstream channels, including downstream channel frequency and downstream signal power and modulation. Status information about the RF upstream channels, including upstream channel ID and upstream signal power and modulation.

Upstream Channel

Status Pages Status Connection Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 21

Status Security Page

This page allows you to define administrator access privileges by changing your SBG941 user name and password. It also allows you to reset your user name and password to the default setting.
Field Descriptions for the Status Security Page
Field Password Change Username New Password Re-Enter New Password Current Username Password Restore Factory Defaults Description Type a new user name Type a new password. The password is case-sensitive. Type the new password again. The password is casesensitive. Type your old password Select Yes or No to reset the user name and password to the default factory settings After restoring the factory defaults, you must login using the default user name, admin, and password, motorola.
Status Pages Status Security Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 22

Status Diagnostics Page

This page provides the following diagnostic tools for troubleshooting IP connectivity problems:
Ping (LAN) Traceroute (WAN)

Ping Utility

Ping (Packet InterNet Groper) allows you to check connectivity between the SBG941 and other devices on the SBG941 LAN. This utility sends a small packet of data and then waits for a reply. When you Ping a computer IP address and receive a reply, it confirms that the computer is connected to the SBG941.
Testing Network Connectivity with the SBG941
To check connectivity between the SBG941 and other devices on the SBG941 LAN, perform the following test: 1. Select Ping from the Select Utility drop-down list. 2. Enter the IP address of the computer you want to Ping in the Target field. 3. Enter the data packet size in bytes in the Ping Size field. 4. Enter the number of ping attempts in the No. of Pings field. 5. Enter the time (in milliseconds) between Ping send operations in the Ping Interval field. 6. Click Start Test to begin the Ping operation. Ping results display in the Results pane.
Status Pages Status Diagnostics Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 23
7. You can click Abort Test at any time during the test to stop the Ping operation. 8. Repeat steps 2 through 6 for each device you want to ping. When done, click Clear Results to delete the Ping results in the Results pane.

Traceroute Utility

Traceroute allows you to map the network path from the SBG941 Configuration Manager to a public host. Selecting Traceroute from the Select Utility drop-down list presents alternate controls for the Traceroute utility.

WAN IP Address The public WAN IP address of your SBG941 device, which is either dynamically or statically assigned by your ISP. Media Access Control address a set of 12 hexadecimal digits assigned during manufacturing that uniquely identifies the hardware address of the SBG941 Access Point. Describes how long before your Internet connection expires. The WAN lease will automatically renew itself when it expires. Displays the exact time and date the WAN lease expires. Click to release WAN lease. Click to renew WAN lease. DHCP or Static IP. If your ISP uses DHCP, select DHCP and enter a Host Name and Domain name, if required. If your ISP uses static IP addressing, select Static IP and enter the information provided by your ISP for Static IP Address, Static IP Mask, Default Gateway, Primary DNS, and Secondary DNS. If WAN Connection Type is DHCP, enter a Host Name, if required. If WAN Connection Type is DHCP, enter a Domain Name, if required. Maximum Transmission Unit (MTU) is the largest size packet or frame that can be sent. The default value is suitable for most users. If WAN Connection Type is Static IP, enter the information provided by your ISP for Static IP Address, Static IP Mask, Default Gateway, Primary DNS, and Secondary DNS.

MAC Address

Duration
Expires Release WAN Lease Renew WAN Lease WAN Connection Type
Host Name Domain Name MTU Size Spoofed MAC Address
When done, click Apply to save your changes.
Basic Pages Basic Setup Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 27

Basic DHCP Page

This page allows you to configure and view the status of the optional internal SBG941 DHCP (Dynamic Host Configuration Protocol) server for the LAN.
Do not modify these settings unless you are an experienced network administrator with strong knowledge of IP addressing, subnetting, and DHCP.
Field Descriptions for the Basic DHCP Page
Field DHCP Server Starting Local Address Description Select Yes to enable the SBG941 DHCP Server. Select No to disable the SBG941 DHCP Server. Enter the starting IP address to be assigned by the SBG941 DHCP server to clients in dotted-decimal format. The default is 192.168.0.2. Sets the number of clients for the SBG941 DHCP server to assign a private IP address. There are 245 possible client addresses. The default is 245. Sets the time in seconds that the SBG941 DHCP server leases an IP address to a client. The default is 3600 seconds (60 minutes).

IP Filtering MAC Filtering Port Filtering Port Forwarding Port Triggers DMZ Host Routing Information Protocol (RIP) Setup

Advanced Pages

The SBG941 Advanced Pages allow you to configure the advanced features of the SBG941:
You can click any Advanced submenu option to view or change the advanced configuration information for that option.

Advanced Options Page

This page allows you to set the operating modes for adjusting how the SBG941 device routes IP traffic.
Advanced Pages Advanced Options Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 31
Field Descriptions for the Advanced Options Page
Field WAN Blocking Description Prevents the SBG941 Configuration Manager or the PCs behind it from being visible to other computers on the SBG941 WAN. Select Enable to turn on this option. Enables the IPsec Pass-Through protocol to be used through the SBG941 Configuration Manager so that a VPN device (or software) may communicate properly with the WAN. Select Enable to turn on this option. Enables the Point-to-Point Tunneling Protocol (PPTP) Pass-Through protocol to be used through the SBG941 Configuration Manager so that a VPN device (or software) may communicate properly with the WAN. Select Enable to turn on this option. Allows remote access to the SBG941 Configuration Manager. For example, in the browser URL window, type http://WanIPAddress:8080/ to access the SBG941 Configuration Manager remotely. Select Enable to turn on this option. Allows multicast-specific traffic (denoted by a specific address) to be passed to and from the PCs on the private network behind the configuration manager. Select Enable to turn on this option. Turns on the Universal Plug and Play protocol (UPnP) agent in the configuration manager. If you are running a CPE (client) application that requires UPnP, select this box. Select Enable to turn on this option. Disables NAT operation allowing all client computers to act as passthrough clients. Select Enable to turn on this option. Specifies up to 32 computers as passthrough clients not subject to NAT, using their MAC addresses. To enable this feature, your cable operator may need to provide additional public IP addresses.

IPsec PassThrough

PPTP PassThrough

Remote Config Management

Multicast Enable

UPnP Enable

Rg PassThrough
PassThrough Mac Addresses
Advanced Pages Advanced Options Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 32

Field Descriptions for the Advanced Port Filtering Page
Field Start Port End Port Protocol Enabled Description Enter the starting port number. Enter the ending port number. Select TCP, UDP, or Both from the drop-down list. Select for each port that you want to activate the IP port filters.
Advanced Pages Advanced Port Filtering Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 35
Advanced Port Forwarding Page
This page allows you to run a publicly accessible server on the LAN by specifying the mapping of TCP/UDP ports to a local PC. This enables incoming requests on specific port numbers to reach web servers, FTP servers, mail servers, etc. so that they can be accessible from the public Internet.
A table of commonly used Port numbers is also displayed on the page for your convenience. The ports used by some common applications are:
HTTP: 80 FTP: 20, 21 Secure Shell: 22 Telnet: 23 SMTP e-mail: 25 SNMP: 161
To map a port, you must enter the range of port numbers that should be forwarded locally and the IP address to which traffic to those ports should be sent. If only a single port specification is desired, enter the same port number in the start and end locations for that IP address.
Advanced Pages Advanced Port Forwarding Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 36
Advanced Port Triggers Page
This page allows you to configure dynamic triggers to specific devices on the LAN. This allows for special applications that require specific port numbers with bi-directional traffic to function properly. Applications such as video conferencing, gaming, and some messaging program features may require these special settings. The Advanced Port Triggers are similar to Advanced Port Forwarding except that they are not static ports held open all the time. When the Configuration Manager detects outgoing data on a specific IP port number set in the Trigger Range, the resulting ports set in the Target Range are opened for incoming (sometimes referred to as bi-directional ports) data. If no outgoing traffic is detected on the Trigger Range ports for 10 minutes, the Target Range ports will close. This is a safer method for opening specific ports for special applications (e.g. video conferencing programs, interactive gaming, file transfer in chat programs, etc.) because they are dynamically triggered and not held open constantly or erroneously left open via the router administrator and exposed for potential hackers to discover.
Field Descriptions for the Advanced Port Triggers Page
Field Trigger Range Start Port Description The starting port number of the Port Trigger range.

Advanced Pages Advanced Port Triggers Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 37
End Port The ending port number of the Port Trigger range.
Target Range Start Port End Port Protocol Enable
The starting port number of the Port Trigger range. The ending port number of the Port Trigger range. Select TCP, UDP, or Both from the drop-down list. Select to activate the IP port triggers.

Advanced DMZ Host Page

This page allows you to specify the default recipient of WAN traffic that NAT is unable to translate to a known local PC. The DMZ (De-militarized Zone) hosting (also commonly referred to as Exposed Host) can also be described as a computer or small sub-network that is located outside the firewall between the trusted internal private LAN and the untrusted public Internet. It 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.

Setting Up the DMZ Host

1. Enter the computers IP address. 2. Click Apply to activate the selected computer as the DMZ host.
Advanced Pages Advanced DMZ Host Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 38
Advanced Routing Information Protocol Setup Page
This page allows you to configure Routing Information Protocol (RIP) parameters related to authentication, destination IP address/subnet mask, and reporting intervals. RIP automatically identifies and uses the best known and quickest route to any given destination address. To help reduce network congestion and delays, the Advanced RIP setup is used in WAN networks to identify and use the best known and quickest route to given destination addresses. RIP is a protocol that requires negotiation from both sides of the network (i.e., CMRG and CMTS). The ISP would normally set this up to match their CMTS settings with the configuration in the CMRG. Note: RIP messaging will only be sent upstream when running in Static IP Addressing mode on the Basic Setup page. You must enable Static IP Addressing and then set the WAN IP network information!
Field Descriptions for the Advanced RIP Setup Page
Field RIP Enable Description Enables or disables the RIP protocol. This protocol helps the router dynamically adapt to the changes in the network. RIP is obsolete since newer routing protocols, such as OSPF and ISIS, have been introduced. If enabled, a plain text password or a shared key authentication is added to the RIP packet in order for the CPE and the wireless router to authenticate each other.

RIP Authentication

Advanced Pages Advanced Routing Information Protocol Setup Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 39
RIP Authentication Key Used to encrypt the plain text password that is enclosed in each RIP packet. If you are using the shared key authentication in RIP, you will need to provide a key. An unsigned 8-bit field in the RIP packet. This field identifies the key used to create the authentication data for the RIP packet, and it also indicates the authentication algorithm. Determines how long before a RIP packet is sent to the CPE. Location where the RIP packet is sent to update the routing table in your CPE. Specifies which CPE you want to receive the RIP packet.
RIP Authentication Key ID
RIP Reporting Interval RIP Destination IP Address RIP Destination IP Subnet Mask
Advanced Pages Advanced Routing Information Protocol Setup Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 40

Firewall Pages

The SBG941 Firewall Pages allow you to configure the SBG941 firewall filters and firewall alert notifications. The SBG941 firewall protects the SBG941 LAN from undesired attacks and other intrusions from the Internet. It provides an advanced, integrated stateful-inspection firewall supporting intrusion detection, session tracking, and denial-of-service attack prevention. The firewall:
Maintains state data for every TCP/IP session on the OSI network and transport layers. Monitors all incoming and outgoing packets, applies the firewall policy to each one, and screens for improper packets and intrusion attempts. Provides comprehensive logging for all: User authentications Rejected internal and external connection requests Session creation and termination Outside attacks (intrusion detection)
You can configure the firewall filters to set rules for port usage. For information about choosing a predefined firewall policy template, see the Firewall Pages. You can click any Firewall submenu option to view or change the firewall configuration information for that option. For information about how the firewall can affect gaming, see Gaming Configuration Guidelines. The predefined policies provide outbound Internet access for computers on the SBG941 LAN. The SBG941 firewall uses stateful-inspection to allow inbound responses when there already is an outbound session running that corresponds to the data flow. For example, if you use a web browser, outbound HTTP connections are permitted on port 80. Inbound responses from the Internet are allowed because an outbound session is established. When required, you can configure the SBG941 firewall to allow inbound packets without first establishing an outbound session. You also need to configure a port forwarding entry on the Advanced Port Forwarding Page or a DMZ client on the Advanced DMZ Host Page.

Firewall Pages Advanced Routing Information Protocol Setup Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 41
Firewall Web Content Filter Page
This page allows you to configure the firewall by enabling or disabling various Web filters related to blocking or exclusively allowing different types of data through the Configuration Manager from the WAN to the LAN. Java Applets, Cookies, ActiveX controls, popup windows, and Proxies can be blocked from this page. Firewall Protection turns on the Stateful Packet Inspection (SPI) firewall features. Block Fragmented IP packets prevent all fragmented IP packets from passing through the firewall. Port Scan Detection detects and blocks port scan activity originating on both the LAN and WAN. IP Flood Detection detects and blocks packet floods originating on both the LAN and WAN.
Select each Web filter you want to enable for the firewall and then click Apply. The Web filters activate without having to reboot the SBG941 Configuration Manager. Note: At least one Web filter or feature must be enabled for the firewall to be active. Make sure the firewall is not disabled.
Firewall Pages Firewall Web Content Filter Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 42

Firewall Local Log Page

This page allows you to set up how to send notification of the firewall event log in either of the following formats:
Individual e-mail alerts sent out automatically each time the firewall is under attack Local log is stored within the modem and displayed in table form on the Local Log page
Field Descriptions for the Firewall Local Log Page
Field Contact Email Address SMTP Server Name Description Your email address. Name of the e-mail (Simple Mail Transfer Protocol) server. The firewall page needs your email server name to send a firewall log to your email address. You can obtain the SMTP server name from your Internet service provider. Enable or disable e-mailing firewall alerts.

E-mail Alerts

Firewall Pages Firewall Local Log Page Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways User Guide 570280-001-a 43

Firewall Remote Log Page

This page allows you to send firewall attack reports out to a standard SysLog server so many instances can be logged over a long period of time. You can select individual attack or configuration items to send to the SysLog server so that only the items of interest will be monitored. You can log permitted connections, blocked connections, known Internet attack types, and CMRG configuration events. The SysLog server must be on the same network as the Private LAN behind the Configuration Manager (typically 192.168.0.x). To activate the SysLog monitoring feature, check all desired event types to monitor and enter the last byte of the IP address of the SysLog server. Normally, the IP address of this SysLog server is hard-coded so that the address always agrees with the entry on this page.

 

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