[PLUTO-help] [OT] Quote of the day - Frase del giorno

[Gian Uberto Lauri]

>>>>> "LP" == Luigi Palmiero <adnusielog4 a rmsud.esercito.difesa.it> writes:

LP> Salve a tutti e scusate se la mia domanda tocca un argomento
LP> strano.  Ho notato, usando un programma di scansione delle porte,
LP> che alcuni PC hanno la porta 17 settata come "Quote of the day"

<SACCENTONE> 

Le porte fino alla 1024 sono riservate dallo IANA (se non erro) e sono
note come Well Know Port  (porte ben conosciute). Microsoft è nota per
aver messo servizi  di suo gradimento su porte  peraltro già assegnate
(ma poco usate, forse). Ma non è questo il caso. 

La porta 17 è regolamentata dalla RFC 865 che segue:

=========================================================================
Network Working Group                                          J. Postel
Request for Comments: 865                                            ISI
                                                                May 1983



                       Quote of the Day Protocol




This RFC specifies a standard  for the ARPA Internet community.  Hosts
on  the ARPA  Internet that  choose to  implement a  Quote of  the Day
Protocol are expected to adopt and implement this standard.

A useful debugging and measurement tool is a quote of the day service.
A quote of the day service simply sends a short message without regard
to the input.

TCP Based Character Generator Service

   One  quote of  the day  service is  defined as  a  connection based
   application on  TCP.  A server  listens for TCP connections  on TCP
   port 17.  Once a connection  is established a short message is sent
   out the  connection (and  any data received  is thrown  away).  The
   service closes the connection after sending the quote.

UDP Based Character Generator Service

   Another quote  of the  day service is  defined as a  datagram based
   application on UDP.  A server listens for UDP datagrams on UDP port
   17.  When  a datagram is  received, an  answering datagram  is sent
   containing a quote (the data in the received datagram is ignored).

Quote Syntax

   There is no specific syntax  for the quote.  It is recommended that
   it  be limited to  the ASCII  printing characters,  space, carriage
   return, and line feed.  The quote  may be just one or up to several
   lines,   but    it   should   be   less    than   512   characters.

=========================================================================
</SACCENTONE>

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