Sling Media Slingbox User Manual page 98

Setup and Installation Assistance
The easiest and most reliable configuration for viewing remotely.
Solution: Follow these instructions if you connected Slingbox to your secondary router.
1. Complete the standard port forwarding setup for your Slingbox and your secondary router (the secondary router is the one connected to your Slingbox;
the primary router is the one between your secondary router and the Internet, as shown below).
94 Slingbox User Guide