It worked before the iptables system was inserted into the > path. All other traffic is being passed successfully - just windows > stuff isn't (though they *can* print to printers on the other side of > the firewall). Nothing is logged when the attempt are made. >From watching this, it doesn't seem to be a netfilter problem at all. Are you sure the routes from/to each network are configured properly? Have you confirmed that you're getting WINS resolution? Is there a reason you're using WINS over W2K DNS resolution? Still have w9x/NT4?