Chapter 5 Further Configuration
5.5Implementing IP Filtering
(Only available in Gateway and Wireless Routing Client mode)
Enabling the IP Filtering function causes the access point to decide, according to predefined rules, whether to block all outgoing packets or to let them pass.
The access point provides granularity and latitude in monitoring the traffic in your network by allowing you to define IP filtering rules, based on these 3 factors:
•Source IP Address
This would allow you to selectively restrict Internet activity originating from a specific PC or group of PCs.
•TCP Port
You may choose to prevent certain applications such as FTP or Telnet, which use a commonly known port number.
•Time frame
For example, you may restrict Internet access from your children’s PC to certain time frames such as between 19H30 and 21H45.
For instance, let us assume that an IP filtering rule has been defined as:
TCP Port 23 from any IP on any day at any time (Port 23 is usually used for Telnet).
If the sent radio button is selected, all outgoing packets will be sent except those belonging to Telnet sessions. On the other hand, if the discarded radio button is selected, all outgoing packets will be blocked except for those belonging to Telnet sessions. We illustrated the second case below.
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