86CHAPTER 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.
