3com 3CRWE52196 ユーザーガイド
Firewall
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4 Select authorized services by clicking in the appropriate check box(es).
In addition to the four authorised services listed, you can choose to allow
or block access to other services. You can either:
or block access to other services. You can either:
■
Allow all other services with exceptions, or
■
Block all other services with exceptions
See
of the previous section for more details.
5 Click Add to save the settings.
Security
Select Security to display the Advanced Settings screen (
Figure 55 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 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.
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.
normally used to test the physical connection between two devices, to
ensure that everything is working correctly.
By default the Gateway has PING disabled in order to make the device
more difficult to find on the Internet and less prone to attack.
more difficult to find on the Internet and less prone to attack.