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Page 81 / 128 Scroll up to view Page 76 - 80
Advanced
85
Security
Select
Security
to display the Security screen.
Security Screen
The Internet connects millions of computer users throughout the world.
The vast majority of the computer users on the Internet are friendly and
have no intention of breaking into, stealing from, or damaging your
network. However, there are hackers who may try to break into your
network. The options in the
Security
tab features help you to protect your
network.
Advanced Settings
The Advanced Settings section of the Security screen displays the
following options:
■
Enable universal plug and play - Universal plug and play allows
compatible software to read and change some the Router’s firewall
settings. This reduces the configuration required but lessens your
control of the Router’s firewall.
Check on the check box to enable this feature, and then select
Apply
.
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86
C
HAPTER
5: R
OUTER
C
ONFIGURATION
3Com recommends that you leave this feature disabled for maximum
security.
■
Allow PING from the Internet - PING is a utility, which is used to
determine whether a device is active at the specified IP address. PING
is normally used to test the physical connection between two devices,
to ensure that everything is working correctly.
By default the Router has PING disabled in order to make the device
more difficult to find on the Internet and less prone to attack.
Check on the check box to enable this feature, and then select
Save
.
3Com recommends that you leave this feature disabled for maximum
security.
■
Disable NAT - Network Address Translation (NAT) is the method by
which the Router shares the single IP address assigned by your ISP
with the computers on the network. Only disable NAT if your ISP
assigns you multiple IP addresses or you need NAT disabled for an
advanced system configuration. If you have a single IP address and
your turn NAT off, the computers on your network will not be able to
access the Internet. Other problems may also occur.
Check on the check box to disable NAT, and then select
Save
.
3Com recommends that you leave this feature enabled for maximum
security.
Enabling Remote Administration
It is possible to administer the Router remotely. Select one of the
following options for remote administration:
■
Disable Remote Administration
- This option is set as default.
■
Enable administration from a
single
Internet Host -
Only the specified
Host IP Address can manage the Router. Any other users will be
rejected.
■
Enable administration from a
whole subnet
- This option allows a
number of users within the specified Host Network Address and
Subnet Mask to administer the Router.
■
Enable administration from
any
Internet Host
- This option allows any
host to access the administration pages.
Page 83 / 128
Advanced
87
To remotely administer your Router, enter
in the location bar of the browser
running on the remote computer, where
xxx.xxx.xxx.xxx
is the Internet IP
address of the Router. You may then login using the administration
password.
Your Internet IP address can be found at the bottom of the screen. .
Syslog
Select Syslog to display the syslog screen.
Check on the check box to enable this feature, and then click Save.
Page 84 / 128
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C
HAPTER
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OUTER
C
ONFIGURATION
Status and Logs
Selecting
Status and Logs
from the main menu displays the
Status,
!
Logs
-
and Routing Table in yur Web browser window.
Status
The
Status
screen displays a tabular representation of your network and
Internet connection.
Status Screen
Page 85 / 128
Status and Logs
89
Logs
Logs will allow you to view both the normal events, and security threats
logged by the Router.
Logs Screen
Select Incoming Log or Outgoing Log from the
Type
drop-down menu.
The Incoming Log will display a temporary log of the Source IP Addresses
and Destination Port Numbers fo rthe incoming Internet trafic. Click the
Save Log button to save this information to
!
a file on your PC's hard drive.
Click the Refresh button to update the log. click the Clean button to clear
all the information that is displayed.
The Outgoing Log will display a temporary log of the LAN IP Addresses,
Destination URLs or IP Addresses, Destination URLs or IP Address, and
Service or Port Numbers for the outgoing Internet traffic. Click the Save
Log button to save this information to a file on your PC's hard drive. Click
the Refresh button to update the log. Click the Clearn button to clear all
the information that is displayed.

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