I have a pretty simple question, which probably has a pretty simple answer. I have two PC\'s connected to a linux router to get online. Now, how can I give any kind of preference to one of these two PC\'s? For example, on the \"secondary\" computer I want to have it set to download all night. On the \"main\" one I want to surf occasionally throughout the night. How can I tell \"router\" that any net requests \"main\" makes are of higher priority, thereby not seriously impacting my browsing times?