Power management+website filtering tweaks

[mod]

Hi;
All I've just setup pfsense again and installed snort+squid .
This is on a system w dualcore and 4 gig ram.
now i'd like to know if we can have the router wake up on traffic for one thing and sleep /power down when  none is detected /needed.

the other issue is facebook pictures in post are not being seen.
some are  but others are not login still works .

anyhelp with this would be great.