Hi Hemant.
I know I can use iptables. I already do, since I don't have any other way to control RALUS.
It's just that it's very un-unixlike to just bind to every possible interface without giving the user the possibility to control it and it's very not-KISS-like. I mean that now I have two things I have to watch for. If I do a mistake in my iptables script I can end up with services open to whole world, which is not a desired situation.
I just find the approach "open and filter" very windows-like (even in NT4 we could bind services to particular interfaces; the possibility was removed in W2k) and very different from the rest of services I run on my linux boxes.