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EtherFast
®
Cable/DSL Firewall Router with 4-Port Switch/VPN Endpoint
From the DHCP screen, shown in Figure 7-28, you can configure the Router as
a DHCP Server.
A Dynamic Host Configuration Protocol (DHCP) server automatically assigns
an IP address to each PC on your network for you. Unless you already have one,
it is highly recommended that you leave the Router enabled as a DHCP server.
DHCP Server
DHCP is already enabled by factory default.
If you already
have a DHCP server on your network, set the Router’s DHCP option to
Disable
. Click the
Apply
button and then the
Continue
button.
If you disable
DHCP, remember to assign a static IP address to the Router.
Starting IP Address
Enter a value for the DHCP server to start with when
issuing IP addresses.
This value must be 192.168.1.2 or greater, because the
default IP address for the Router is
192.168.1.1
.
55
Firmware Version
This field shows the installed version and date of the
firmware.
Version dates are slightly more accurate than version numbers.
Current Time
Based upon the time zone selection made on the Setup tab, this
field will display the current time.
Login
This indicates if you are using a dial-up style connection like PPPoE,
RAS, PPTP, or HBS. For PPPoE, RAS, PPTP, or HBS only, there is a
Connect
button to click if you are disconnected and want to re-establish a connection.
LAN
These fields display the current IP Address and Subnet Mask of the
Router, as seen by users on your local area network. The DHCP Server field
shows the status of the Router’s DHCP server function, which is either enabled
or disabled.
WAN
These fields display the WAN IP Address, WAN Subnet Mask, and
WAN Default Gateway IP Address of the Router, as seen by external users on
the Internet. The DNS (Domain Name System) IP Address fields show the IP
address(es) of the DNS currently used by the Router. Multiple DNS IP settings
are common. In most cases, the first available DNS entry is used.
DHCP Release
Click the
DHCP Release
button to release the current IP
address of the device connected to the Router’s WAN port.
DHCP Renew
Click the
DHCP Renew
button to replace the current IP
address—of the device connected to the Router’s WAN port—with a new IP
address.
DHCP Clients Table
Click the
DHCP Clients Table
button to view the list of
PCs that were given IP addresses by the Router.
54
DHCP
Figure 7-28
Instant Broadband
®
Series
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Page 32 / 75
EtherFast
®
Cable/DSL Firewall Router with 4-Port Switch/VPN Endpoint
The Log tab, shown in Figure 7-29, provides you with a log of all incoming and
outgoing URLs or IP addresses for your Internet connection.
To access activity logs, select the
Enable
option next to Log. This function can
be disabled by clicking the
Disable
radio button.
With logging enabled, you can choose to view temporary logs or have a per-
manent record, using the Logviewer software. Temporary logs can be accessed
from the Log screen by clicking either the
Incoming Access Log
or
Outgoing
Access Log
button. The Incoming Access Log gives you a log of all the incom-
ing Internet traffic while the Outgoing Access Log lists all the URLs and IP
addresses of Internet sites that users on your network have accessed.
For a permanent record of these logs, Logviewer software must be used. This
software is downloadable from the Linksys website,
www.linksys.com
. The
Logviewer saves all incoming and outgoing activity as a permanent file on your
PC’s hard drive. In the
Send Log to
field, enter the fixed IP address of the PC
running the Logviewer software. The Router will now send updated logs to that
PC.
Click the
View Logs
button for a selection of logs to view (see Figure 7-30).
57
Number of DHCP Users
(Optional) Enter the maximum number of PCs that
you want the DHCP server to assign IP addresses to. This number cannot be
greater than 253.
In order to determine the DHCP IP Address range, add the
starting IP address (e.g., 100) to the number of DHCP users.
By default, as
shown in Figure 7-28, add 100 to 50, and the range is 192.168.1.100 to
192.168.1.149.
Client Lease Time
The Client Lease Time is the amount of time a network
user will be allowed connection to the Router with their current dynamic IP
address. Enter the amount of time, in minutes, that the user will be “leased” this
dynamic IP address.
DNS
The Domain Name System (DNS) is how the Internet translates domain
or website names into Internet addresses or URLs. Your ISP will provide you
with at least one DNS Server IP Address. If you wish to use another, type that
IP Address
in one of these fields. You can type up to three DNS Server IP
Addresses here. The Router will use these for quicker access to functioning
DNS servers. Otherwise, leave this blank.
WINS
The Windows Internet Naming Service (WINS) manages each PC’s
interaction with the Internet. If you use a WINS server, enter that
server’s IP
Address
here. Otherwise, leave this blank.
DHCP Clients Table
Click the
DHCP Clients Table
button to show the cur-
rent DHCP Client data. (This data is stored in temporary memory and changes
periodically.)
To apply any of the settings you change on a page, click the
Apply
button, and
then click the
Continue
button.
To cancel any values you’ve entered on any
page, click the
Cancel
button.
56
Log
Figure 7-29
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®
Series
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EtherFast
®
Cable/DSL Firewall Router with 4-Port Switch/VPN Endpoint
59
From the drop-down menu, select the log you wish to view: All (to view all
logs), System Log, Access Log, Firewall Log, or VPN Log.
• System Log
The System Log screen displays a list of cold and warm
starts, web login successes and failures, and packet filtering policies.
• Access Log
The Access Log screen shows all incoming and outgoing
traffic.
• Firewall Log
The Firewall Log screen lists activities performed by the
firewall to prevent DoS attacks, including URL filtering and time filtering.
• VPN Log
The VPN Log screen displays successful connections, trans-
missions and receptions, and the types of encryption used.
To clear a log, click the
Clear
button. To refresh a log, click the
Refresh
but-
ton. To return to the Log screen, close this window.
To clear any values you’ve entered on any page, click
Cancel
and re-enter
information. To apply any settings you’ve altered on any page, click the
Apply
button. Once all settings are correct, click
Continue
.
58
Under the Help tab, shown in Figure 7-31, you’ll find links to all of the Utility’s
internal support documentation, including the application that upgrades the
Router’s firmware.
Clicking on any of the topics in the bar on the left will give you help informa-
tion about that topic.
Clicking the Linksys Website link will take you to Linksys’s website,
www.linksys.com
, provided you are connected to the Internet.
Clicking the Online manual in PDF format link will take you to the latest ver-
sion of the user guide for this Router. The guide will be in Adobe Acrobat
Portable Document File (.pdf) format. You will need the Adobe Acrobat Reader
to view this pdf. If you do not have the Acrobat Reader, click the Adobe
Website link to download it.
New firmware versions are posted at
www.linksys.com
and can be downloaded
for free.
If the Router can access the Internet already, there’s no need to down-
load a newer firmware version, unless that version has a new feature that you
want to use.
Loading new firmware onto the Router does not always enhance
the speed or the quality of your connection.
Help
Figure 7-31
Instant Broadband
®
Series
Figure 7-30
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EtherFast
®
Cable/DSL Firewall Router with 4-Port Switch/VPN Endpoint
The Filters screen, shown in Figure 7-33, allows you to block or allow specific
kinds of Internet usage. You can set up Internet access policies for specific PCs.
Internet Access Policy
Multiple filters can be saved as Internet Access
Policies. To create or edit a Policy, select the number of the Policy from the
drop-down menu. The screen will change to reflect the settings of this Policy.
If you want to delete this Policy, click the
Delete
button.
61
60
Filters
Figure 7-33
Instant Broadband
®
Series
To upgrade the Router’s firmware:
1. Select the
Help
tab (see Figure 7-31).
2. Click
Upgrade Firmware
to display the window shown in Figure 7-32.
3. Click the
Browse
but-
ton
to
find
the
firmware upgrade file
that you downloaded
from
the
Linksys
website
and
then
extracted.
4. Double-click the
firmware file
you downloaded and extracted.
Click the
Upgrade
button, and follow the instructions there.
The following tabs are for advanced users or users whose setup needs require
special configuration. When you click the Advanced tab, you will be able to set
up these features. There are six additional tabs available.
•
Filters - Allows you to block or allow specific kinds of Internet usage.
•
Forwarding - Sets up public services on your network.
•
Dynamic Routing - Sets up the Router so it will automatically adjust to
physical changes in the network’s layout.
•
Static Routing - Sets up static routes as needed when network information
must travel to a specific host or network.
•
DMZ Host - Allows one local user to be exposed to the Internet for use of
special-purpose services such as online gaming or videoconferencing.
•
MAC Address Cloning - Allows you to “clone” your Ethernet adapter’s
MAC address onto the Router.
Note:
By upgrading the Router’s firmware, you may lose the Router’s
configuration settings.
Figure 7-32
Advanced
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EtherFast
®
Cable/DSL Firewall Router with 4-Port Switch/VPN Endpoint
5.
To block websites with specific URL addresses, enter each URL address in
a
Website Blocking by URL Address
field. You can enter up to four URL
addresses.
6.
To block websites that use specific keywords as part of their URL address-
es, enter each keyword in a
Website Blocking by Keyword
field. You can
enter up to six keywords.
7. Select the service(s) you want to block. The default setting is
Disable
.
Default services include FTP, Telnet, SMTP, DNS, TFTP, HTTP, POP3,
NNTP, SNMP, and Ping. To add a service or edit a service’s settings, follow
these instructions:
a.
Click the
Add Service
button (see Figure 7-
36). You can have up to
60 services, including
default services such as
FTP and Telnet.
63
62
Instant Broadband
®
Series
To see a summary of all Policies, click the
Summary
button.
The Policies are listed on this screen with their names and settings (see Figure
7-34). To update the
Internet Policy Summary
screen with the most recent infor-
mation, click the
refresh
button. To delete any Policy from this screen, check
the empty box beneath the
Delete
button, and then click the
Delete
button. To
return to the
Filters
screen, click the
Close
button.
Enter Policy Name
Policies are created using the settings on the
Filters
screen. To create a policy:
1. Enter a
Policy Name
in the field provided.
2. Select whether you want to
Allow
or
Deny
Internet access for the PCs you
will list on the
List of PCs
screen, during the days and hours you will select.
3. Select the appropriate
Days
and
Time
during which you want Internet
access to be filtered.
4. Click the
Edit List of PCs
button. The
List of PCs
screen will appear (see
Figure 7-35).
All PCs
is selected by default. Enter the IP address or MAC
address of any PC to which this Policy will apply. You can enter a range of
IP addresses to select multiple PCs. Click the
Apply
button to save your
settings. Click the
Cancel
button to undo any changes. Click the
Close
but-
ton to return to the
Filters
screen.
Figure 7-34
Figure 7-35
Figure 7-36
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