Edimax Technology Wireless 3G Portable Router 3G-6210n - Manual (Page 127)

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Here are descriptions of every setup items:
Client PC
Please input any text to describe this IP
Description (a): address, up to 16 alphanumerical characters.
Client PC IP
Please input the starting IP address in the left
address (b): field, and input the end IP address in the right field
to define a range of IP addresses, or just input the
IP address in the left field to define a single IP
address.
Client PC
Please check all services you want to allow or
Service (c): deny this IP address to use, you can check multiple
services.
Protocol (d):
If the service you need is not listed above, you can
create a new service on your own. Please select
TCP or UDP, if you’re not sure, please select
‘Both’.
Port Range (e):
Please input the port range of new service here. If
you want to specify port 80 to 90, please
input ’80-90’; if you want to apply this rule on a
single port, just input the port number, like ‘80’.
Add (f):
When you finish with all settings, please click ‘Add’
to save settings, you’ll be brought back to previous
menu, and the rule you just set will appear in
current IP filtering table.
If you want to remove all settings in this page, click ‘Reset’ button.
3-3-2 URL Blocking
If you want to prevent computers in local network from accessing certain
website (like pornography, violence, or anything you want to block), you
can use this function to stop computers in local network from accessing