1 line null webserver

[Mike Wright]

Hi all,

I'm using dnsmasq to create an ad/media blocker.  Whenever it receives a 
request for any listed domain I want to return a specific IP that points 
to a dummy webserver.  That part works.

It's the dummy webserver that has me stumped.  I'd like it to return 0 
bytes, status 200 for every connection to port 80.

nc seems like a good candidate but I can't get it right.

Anybody have a nc one-liner or other alternative that would accomplish this?

Thanks for any ideas,
Mike Wright