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86 CHAPTER 5: ROUTER CONFIGURATION
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.