Is it possible to force BIND to use TCP exclusively?

[Paul Vixie]

> > > Are there any configuration changes that can be made to BIND to force
> > > it to use TCP exclusively and never use UDP?  Possible?
> >
> > no.
> 
> Ok - thats unfortunate - your the expert here.

if you think i'm the expert, then listen when i say, it's not unfortunate
that bind lacks this configuration option.  such an option would belong on
http://failblog.org/.

> If I restrict any UDP traffic on port 53 will BIND fall back to TCP?

no.  TCP is only required for zone transfers and after truncation on UDP.

every RDNS that ever tried 100% TCP failed spectacularly to achieve orbit.

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