Is your address rang 192.168.70.x or 192.168.0.x? your reverse zone is setup as 192.168.0.x I bet 'host 192.168.0.1' will work. basically you have the reverse setup incorrectly.

Just because it "From Sony" doesnot mean it won't work. It just may take a bit more effort.

There is a tutorial here on linux.com Configuring your webcam to work under Linux

Also can you provide a bit more information on the cam you want to use?

specific model?

is it usb? if so give us the output of the lsusb command (this will list all the usb devices in your system)

Mike