DNS uses both TCP and UDP.

And last time I checked (some time ago, admittedly), IPNAT worked just
fine with both TCP and UDP.

On Wed, 14 Jul 1999, Mason Loring Bliss wrote:

> On Wed, Jul 14, 1999 at 08:04:40AM +0200, Thilo Manske wrote:
> 
> > And what about DNS? You have to run a caching nameserver as DNS proxy
> > since DNS requests (generally) run over UDP and that doesn't work with
> > ipnat very well (if at all).
> 
> Do they? I could have sworn that DNS was TCP-based. In any event, I have a
> friend who has just this sort of setup - NetBSD on the firewall, and a Windows
> box inside. The windows box is using DNS on an outside server, and it hasn't
> experienced any NAT-related glitches.
> 
> -- 
>     Mason Loring Bliss  mason@acheron.middleboro.ma.us  They also surf who
> awake ? sleep : dream;  http://acheron.ne.mediaone.net  only stand on waves.
> 
> 

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