Wellink Corporation W202ER-4 Manual Do Utilizador
VisionNet 202ER-4 ADSL Ethernet Router User’s Guide
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3. When you are done selecting criteria, ensure that the Enable
radio button is selected at the top of the page, and then click
.
After a confirmation page displays, the IP Filter Configuration
page will redisplay with the new rule showing in the table.
page will redisplay with the new rule showing in the table.
If the security level of the rule matches the globally configured
setting, a green ball in the Status column for that rule, indicating
that the rule is now in effect. A red ball will display when the rule
is disabled or if its security level is different than the globally
configured level.
setting, a green ball in the Status column for that rule, indicating
that the rule is now in effect. A red ball will display when the rule
is disabled or if its security level is different than the globally
configured level.
4. Ensure that the Security Level and Private/Public/DMZ
Default Action settings on the IP Filter Configuration page
are configured as needed, then click
A page displays to confirm your changes.
5. Click
Save and Reboot
in the Save Setting tab.
6. Click
to save your changes to permanent memory.
IP filter rule examples
Example 1. Blocking a specific computer on your LAN from using
accessing web servers on the Internet:
accessing web servers on the Internet:
1. Add a new rule for outgoing packets on the ppp-0 interface
from any incoming interface (this would include the eth-0 and
usb-0 interfaces, for example).
usb-0 interfaces, for example).
2. Specify a source IP address of the computer you want to
block.
3. Specify the Protocol = TCP and enable the Store State
setting.
4. Specify a destination port = 80, which is the well-known port
number for web servers.
5. Enable the rule by clicking the radio button at the top of the
page.
6. Click
to create the rule.
7. On the IP Filter Configuration page, set the Security Level to
the same level you chose for the rule, and set both the
Private Default Action and the Public Default Action to
Accept.
Private Default Action and the Public Default Action to
Accept.
8. Click
, and commit your changes.
Figure 51 on page 123 shows the configuration for this rule. The
specified computer will not be able to access the Web, but will be
able to access FTP Internet sites (and any others that use
destination port numbers other than 80).
specified computer will not be able to access the Web, but will be
able to access FTP Internet sites (and any others that use
destination port numbers other than 80).
Example 2. Blocking Telnet accesses to the VisionNet 202ER-4: