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Setting LAN IP Filtering

The LAN IP address filtering function is used to block specified clients in the LAN from accessing specified Internet services.

Prerequisite

The IP address filtering function is enabled. For details, see Enabling or Disabling the Firewall.

Context

The following table lists common protocols at the application layer of TCP/IP.

Protocol Default Port Service Provided
HTTP 80 Browse web pages.
SMTP 25 Send emails.
POP3 110 Receive emails.
FTP 21 Transfer files.
TELNET 23 Log in to a remote computer.
NOTE:

For details about the port used for a service, contact your service provider.

Procedure

  1. Choose > > .
  2. Choose one of the following options:
    • : Set the websites that you do not want users to access. A maximum of 16 websites can be added.
    • : Set the websites that users are allowed to access. A maximum of 16 websites can be added.
  3. Click and set the parameters.
  4. Click to save the settings.

    NOTE:
    • Click to edit a selected item in the list.
    • Click to delete a selected item from the list.

  5. Click for the settings to take effect.

Restricting Clients in a WLAN from Accessing Specified Websites

For example, if you want to restrict a client (192.168.1.101) in a WLAN from accessing www.abc.com, perform the following steps:

  1. Choose > > .
  2. Select .
  3. Click and set the parameters.

    Enter 192.168.1.101.

    NOTE:

    You can view the IP addresses of the clients connected to the under the section on the page.

    Enter 80.
    1. On your computer, choose Start > Run.
    2. Enter cmd and press Enter.
    3. In the displayed window, enter ping www.abc.com and press Enter.
    4. View the IP address of www.abc.com. For example, it is 1.2.3.4.
    5. In the text box for , enter 1.2.3.4.
    NOTE:

    The Windows 7 operating system is used in this example to describe how to obtain WAN IP addresses.

    Enter 80.

    Select .

    NOTE:

    If you do not know the protocol, select . The will automatically select an appropriate protocol.

    Select .

    Click .
  4. Click for the settings to take effect.
Parent topic: Security Settings