[Dario Ciccarone <dciccaro@xxxxxxxxxxxx>]

Actually, since RFC-2671, UDP answers can be > 512 octets.

 

the trick would be for the client to perform a DNS query, and if TC flag on the answer ==1, retry the query using TCP.

 

a slightly outdated, but still useful PPT file can be grabbed from http://www.cs.rpi.edu/~hollingd/netprog2001/notes/hw3/hw3.ppt

 

Rodrigo Sanchez Re <rodrigo.sanchezre@xxxxxxxxxxx> wrote:

> Thanks for you answer.
>
> Rodrigo
>
> -----Mensaje original-----
> De: Jack Coates [mailto:jack@xxxxxxxxxxxxxxxx] 
> Enviado el: Martes, 30 de Noviembre de 2004 02:20 p.m.
> Para: Ethereal user support
> Asunto: Re: [Ethereal-users] DNS Query over TCP
>
>
> Bob DeBolt wrote:
>
> > 
> >
> > DNS queries over 500 bytes if memory serves) will go TCP 
> > Note the packet size ofthe capture 
> > 
> > 
> > Bob D
> >
>
> 512 octets. RFC 1035 isn't clear on this, but 1123 discusses it: 
> http://www.freesoft.org/CIE/RFC/1123/128.htm
>
> -- 
> Jack at Monkeynoodle dot Org: It's a Scientific Venture...
> Riding the Emergency Third Rail Power Trip Since 1996
>
> _______________________________________________
> Ethereal-users mailing
>  list
> Ethereal-users@xxxxxxxxxxxx
> http://www.ethereal.com/mailman/listinfo/ethereal-users
>
> _______________________________________________
> Ethereal-users mailing list
> Ethereal-users@xxxxxxxxxxxx
> http://www.ethereal.com/mailman/listinfo/ethereal-users

---

Ahora pod�s usar Yahoo! Messenger en tu Unif�n, 
en cualquier momento y lugar.
 
Encontr� m�s informaci�n aqu�.