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Page 46 / 78 Scroll up to view Page 41 - 45
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Advanced Pages • Advanced DMZ Host Page
Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways • User Guide
38
570280-001-a
End Port
The ending port number of the Port Trigger range.
Target Range
Start Port
End Port
The starting port number of the Port Trigger range.
The ending port number of the Port Trigger range.
Protocol
Select
TCP
,
UDP
, or
Both
from the drop-down list.
Enable
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 computer’s IP address.
2.
Click
Apply
to activate the selected computer as the DMZ host.
Page 47 / 78
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Advanced Pages • Advanced Routing Information Protocol Setup Page
Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways • User Guide
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570280-001-a
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
Description
RIP Enable
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.
RIP Authentication
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.
Page 48 / 78
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Advanced Pages • Advanced Routing Information Protocol Setup Page
Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways • User Guide
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570280-001-a
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.
RIP Authentication Key ID
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.
RIP Reporting Interval
Determines how long before a RIP packet is sent to the CPE.
RIP Destination IP Address
Location where the RIP packet is sent to update the routing
table in your CPE.
RIP Destination IP Subnet Mask
Specifies which CPE you want to receive the RIP packet.
Page 49 / 78
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Firewall Pages • Advanced Routing Information Protocol Setup Page
Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways • User Guide
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570280-001-a
8
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
.
Page 50 / 78
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Firewall Pages • Firewall Web Content Filter Page
Motorola SURFboard SBG941 Series Wireless Cable Modem Gateways • User Guide
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570280-001-a
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.

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