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IP Filter Setup
The IP filter function is similar to URL Filter. It provides further restrictions in
access permission. URL Filtering only blocks port number 80 (HTTP). In IP
filtering, you can assign a group of IP to be restricted. You can block four
individual ports or a range of ports in the same time. So the specific group of
intranet hosts cannot connect to these ports. Please follow the steps:
1. Select Enable radio button in IP Filter.
2. Enter the IP address range in the format “x. x. x. x / x”(e.g.
“192.168.1.0/24”, you would like to restrict the IP group)
3. Select the Protocol.
4. Enter the port number in Blocked Ports No. There are four
fields you can enter in any order or combination. You can enter
one, two, etc.
5. Enter the range of port numbers (if any) in Blocked Port Range.
In the example, if any hosts that requests information from 192.168.1.1 to
192.168.1.254 in the intranet with port number 21, 23 or from 100 to 1024
with TCP protocol, will be blocked.