Well what I meant is that, in my router I can block packets that are going outside to the WAN whose destination is a specified (by me) a port # on a range of IP address.
Is, for example, port 138 on my host sending out to port 137 listening on another host (or visa versa)? If so I could maybe block the packets going out to those ports. My thought was that if that aspect of the router worked, I wouldn't need the iptables restriction, and make the host visible on my network again. However, I guess it really doesn't matter. It seems to be working the way I'd like. Even though I can't see the server on the network, my other machines can still map the drive it is serving out. Plus, the modem is sleeping thru most of the night now. Just wish my 1 1/2 year old would.
Thanks much for your info and the time you did researching it.