UDP open ports [was: ubuntu-devel Digest, Vol 23, Issue 16]

[Scott James Remnant]

On Wed, 2006-07-05 at 11:40 +1000, Matthew Palmer wrote:

> On Tue, Jul 04, 2006 at 08:55:54PM -0400, Ivan Krstic wrote:
> > Dan Kegel wrote:
> > > I wonder how practical it would be to get glibc to use tcp for
> > > DNS requests...
> > 
> > Not an option; many sites only allow AXFRs via TCP/53.
> 
> Then those sites are broken.  A DNS server must allow TCP/53 for responses
> which are larger than a single UDP packet.
> 
But I do not believe they must allow TCP/53 for responses that are
SMALLER than a single UDP packet.

Scott
-- 
Scott James Remnant
scott at ubuntu.com
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