AirLive WHA-5500CPE-PCBA - Manual (Page 59)

3. Basic Configuration
3.8.6 IP Filtering Settings
Advanced Setting>>IP Filtering Settings
IP filtering is simply a mechanism that decides which types of IP datagrams will be
processed normally and which will be discarded.
This allows you to define rules for allowing / denying access from / to the Internet.
Please do set both inbound/outbound in order to get complete connection. Only inbound or
outbound will not allow to get response from the destination IP.
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AirLive WHA-5500CPE User’s Manual