From: Matt Mackall <redacted>
Date: Wed, 30 Jul 2008 20:10:09 -0500

Of course not. It's a webcam. Or it's a printer or game console or media
streamer or alarm clock or BluRay player, etc. Yes, I do have a
Linux-powered alarm clock (A Nokia N800) and no, it doesn't have a
firewall.

Most game consoles and cell phones make use of either firewalling
or IPSEC, or both.

Looking at various kernel boot message logs of N800's posted online,
it seems to have netfilter enabled.  The ip_tables module does get
loaded.