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Page 16 / 351 Scroll up to view Page 11 - 15
16
Management
Embedded Web Server
There is no specialized software to install on your PC to configure, manage, or maintain
your Motorola Netopia® Gateway. Web pages embedded in the operating system provide
access to the following Gateway operations:
•
Setup
•
System and security logs
•
Diagnostics functions
Once you have removed your Motorola Netopia® Gateway from its packing container and
powered the unit up, use any LAN attached PC or workstation running a common web
browser application to configure and monitor the Gateway.
Diagnostics
In addition to the Gateway’s visual LED indicator lights, you can run an extensive set of
diagnostic tools from your Web browser.
Two of the facilities are:
•
Automated “Multi-Layer” Test
The
Run Dia
gnostics
link initiates a sequence of tests. They examine the entire
functionality of the Gateway, from the physical connections to the data traffic.
•
Network Test Tools
Three test tools to determine network reachability are available:
Ping
- tests the “reachability” of a particular network destination by sending an ICMP
echo request and waiting for a reply.
NSLookup
- converts a domain name to its IP address and vice versa.
TraceRoute
- displays the path to a destination by showing the number of hops and the
Gateway addresses of these hops.
The system log also provides diagnostic information.
Page 17 / 351
17
Management
☛
NOTE:
Your Service Provider may request information that you acquire from these var-
ious diagnostic tools. Individual tests may be performed at the command line.
(
See “Command Line Interface” on page 163.
).
Page 18 / 351
18
Security
Remote Access Control
You can determine whether or not an administrator or other authorized person has access
to configuring your Gateway. This access (either time-restricted or unlimited until the router
is rebooted) can be turned on or off in the Web interface. Additionally, permanent remote
access can be configured in the CLI.
Password Protection
Access to your Motorola Netopia® device can be controlled through two access control
accounts,
Admin
or
User
.
•
The
Admin
, or administrative user, performs all configuration, management or mainte-
nance operations on the Gateway.
•
The
User
account provides monitor capability
only
.
A user may
NOT
change the configuration, perform upgrades or invoke maintenance
functions.
Network Address Translation (NAT)
The Motorola Netopia® Gateway Network Address Translation (NAT) security feature lets
you conceal the topology of a hard-wired Ethernet or wireless network connected to its LAN
interface from Gateways on networks connected to its WAN interface. In other words, the
end computer stations on your LAN are
invisible
from the Internet.
Only a
single WAN IP address
is required to provide this security support for your entire
LAN.
LAN sites that communicate through an Internet Service Provider typically enable NAT,
since they usually purchase only one IP address from the ISP.
•
When NAT is
ON
, the Motorola Netopia® Gateway “proxies” for the end computer sta-
tions on your network by pretending to be the originating host for network communica-
tions from non-originating networks. The WAN interface address is the only IP address
exposed.
Page 19 / 351
19
Security
The Motorola Netopia® Gateway tracks which local hosts are communicating with which
remote hosts. It routes packets received from remote networks to the correct computer
on the LAN (Ethernet) interface.
•
When NAT is
OFF
, a Motorola Netopia® Gateway acts as a traditional TCP/IP router, all
LAN computers/devices are exposed to the Internet.
A diagram of a typical NAT-enabled LAN follows:
☛
NOTE:
1. The default setting for NAT is
ON
.
2. Motorola uses Port Address Translation (PAT) to implement the NAT facility.
3. NAT Pinhole traffic (discussed below) is always initiated from the WAN side.
WAN
Interface
LAN
Ethernet
Interface
Motorola Netopia® Gateway
NAT
Internet
Embedded Admin Services:
HTTP-Web Server and Telnet Server Port
NAT-protected
LAN stations
Ethernet
Page 20 / 351
20
Motorola Netopia® Advanced Features for NAT
Using the NAT facility provides effective LAN security. However, there are user applications
that require methods to selectively by-pass this security function for certain types of Inter-
net traffic.
Motorola Netopia® Gateways provide special gaming and other service configuration tools
that enable you to establish NAT-protected LAN layouts that still provide flexible by-pass
capabilities.
Some of these rules require coordination with the unit’s embedded administration ser-
vices: the internal Web (HTTP) Port (TCP 80) and the internal Telnet Server Port (TCP 23).
Internal Servers
The internal servers are the embedded Web and Telnet servers of the Gateway. You would
change the internal server ports for Web and Telnet of the Gateway if you wanted to have
these services on the LAN using pinholes or the Default server. Pinhole configuration rules
provide an internal port forwarding facility that enables you to eliminate conflicts with
embedded administrative ports 80 and 23.
Default Server
This feature allows you to:
•
Direct your Gateway to forward all externally initiated IP traffic (TCP and UDP protocols
only) to a default host on the LAN.
•
Enable it for certain situations:
Where you cannot anticipate what port number or packet protocol an in-bound applica-
tion might use.
For example, some network games select arbitrary port numbers when a connection is
opened.
When you want all unsolicited traffic to go to a specific LAN host.
Combination NAT Bypass Configuration
Specific Games and services and Default Server settings, each directed to different LAN
devices, can be used together.

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