Hasn't this been hashed over several times in the past year to the same end result? :-) It appeared to me the original issue (this time) was being able to do primary and secondary dns on one box with different ip addresses because the registrar needed two different ip addresses when registering a domain. If you must do it at home and you cannot get this solution to work as you expect, get a routed subnet on one side. or ...better yet, since both links appear to be residential, ask a buddy with a colo for for access and make it the primary dns and pull secondary on your residential, or get a VPS server or two, or something else... Unless it is a pure don't care if down sometimes hobby, having primary and secondary dns on last mile residential links, regardless of budget or your reliability perceptions, is not particularly wise. - rh