That's some pretty shabby tactics.
As pointed out in nanae newsgroup it rewrites the IP address of legitimate packets, so your data goes to Belkin.

Also noted: a) for an internal LAN it is unknown exactly what happens when the request fails, b) and it may cause serious failures on unattended systems and c) it happens "every 8 hours" which could be quite often on a lightly loaded router.

Gareth