User's Manual

System Tools 49
3Com recommends that you leave this disabled.
Disable Firewall The Gateway contains a firewall that detects attack patterns
used by hackers on the Internet and once detected will block their access to your
network. When an attack is detected a log entry will be generated and the Alert
LED will be lit for 2 seconds. The firewall will block Internet access to all unused
ports.
The Firewall is disabled by clicking on the check box so that a tick can be seen and
then pressing the Apply button.
3Com recommends that you leave this enabled.
Enabling Remote Administration It is possible to administer the Gateway
from the Internet. To do this:
1 Check the Enable administration from an Internet Host box
2 For added security, you may specify the IP address of the remote system. This will
prevent other remote hosts from accessing the administration pages. If you wish
to allow any remote host to administer the Gateway, type 0.0.0.0 in the Host IP
Address box.
3 To remotely administer your Gateway, enter http://xxx.xxx.xxx.xxx:8000 in the
location bar of the browser running on the remote computer, where
xxx.xxx.xxx.xxx is the Internet IP address of the Gateway. You may then login using
the administration password.
System Tools
After you have completed all basic setup procedures in the Welcome Wizard
section, you can go in later and change individual settings at any time by using the
System Tools.
The main frame of the System Tools screen includes four administration items:
Restart, Time Zone, Configuration, and Upgrade (Figure 51).
Restart
Figure 51 Restart Screen
If your Gateway is not operating correctly, you can choose to restart the Gateway.
Pressing the Restart the Gateway button will cause the Gateway to restart,
simulating the effect of power cycling the unit. No configuration information will
be lost but the log files will be erased. This function may be of use if you are
experiencing problems and you wish to re-establish your Internet connection. Any