Re: Why one port?

[Kandra Nygårds <kandra@foxette.net>]

From: "Ed Sawicki" <ed@alcpress.com>

> I'm wondering why there is only one UDP port assigned to the DNS
> protocol? It prevents us from using both an iterative name
> server and a recursive name server/cache on the same computer
> when only one IP address is available.

Presumably so that clients would not have to guess what port to use.

It does make some sense in allowing a user-configurable port, but it makes
(IMHO) a lot more sense in sticking to a single DNS-port.

I have to wonder, why are you only able to use a single IP-address? Is it a
provider limitation? Get a real provider. OS limitation? Application
limitation? In either case, I'd recommend running the resolver on a separate
machine. If security is your concern, it makes even more sense, and you
don't have to rewrite the Internet to do it.


- Kandra



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