Tenda W300D User Manual page 70

ADSL2/2+ Router
initiated by application programs succeed.
For example, you have created a server on router's LAN side that can
automatically download material from Internet (via port: 9090) and
share its data with other users. And you want Internet users to
download data from your server (via port: 9999). For configurations,
follow the instructions below:
To enter the port-triggering interface, click "Advanced Setup"
"NAT" "Port Triggering", and then click the "Add" button to configure
the page below (Refer to the parameters configured on the page
below):
When your server initiates a connection toward the server on Internet
via port: 9090, the router's firewall will automatically open port: 9999 to
let Internet users access your server to download data via this port:
9999.
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