IETF Logo Mail Archive

RE: IPP> Re: New IPP Scheme

Robert Herriot <robert.herriot@Eng.Sun.COM> Thu, 16 July 1998 19:16 UTC

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Date: Thu, 16 Jul 1998 12:09:49 -0700
To: "Carl Kugler" <kugler@us.ibm.com>, ipp@pwg.org
From: Robert Herriot <robert.herriot@Eng.Sun.COM>
Subject: RE: IPP> Re: New IPP Scheme
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I wrote the sentences that you are asking about.  I tried to pick words that 
would be unambiguous.

The intention is that IPP software must be able to listen on port 631 and 
may be able to listen on other ports.
If such software allows an administrator to configure the ports, then such 
an adminstrator may be able to have IPP software listen other ports, such as 
port 80 and might make it be the only port that the IPP server listens on.  
The customer has the right to do what he wants, even if we don't think it is 
the wisest choice.

Bob Herriot


At 10:24 AM 7/16/98 , Carl Kugler wrote:
>Carl:
>> 
>> The implementation MUST support port 631 however, mine is administratively
>> set to only OPERATE on port 80.  The code is compliant.
>> 
>> Don
>> 
>> 
>Hmmm... I think we need some clarification in the wording here, because I
think it's ambiguous as it stands.  Here's another quote:  "IPP server
implementations MUST offer IPP services using HTTP over the IANA assigned Well
Known Port 631 (the IPP default port). IPP server implementations may support
other ports, in addition to this port."
>
>So you read "suport" and "offer IPP services" to mean "can be configured to
listen on" rather than "is required to listen on"?
>
>    -Carl
>
>> 
>> 
>> "Carl Kugler" <kugler%us.ibm.com@interlock.lexmark.com> on 07/16/98
>> 12:18:26 PM
>> 
>> To:   ipp%pwg.org@interlock.lexmark.com
>> cc:    (bcc: Don Wright)
>> bcc:  Don Wright
>> Subject:  RE: IPP> Re: New IPP Scheme
>> 
>> 
>> 
>> 
>> ...
>> > Sorry Larry, but my printer isn't on the default IPP port of 631.  Mine
>> is
>> > on 80 so my URL is exactly right.  Not all implementations MUST be on
>> 631.
>> ...
>> That's not how I read ftp://ftp.pwg.org/pub/pwg/ipp/new_PRO/ipp-pro-980630
>> 
>> It says "It is REQUIRED that a printer implementation support HTTP over the
>> IANA assigned Well Known Port 631...".  Therefore, a conforming
>> implementation MUST be on 631, although it might also be on some other port
>> simultaneously.
>> 
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>> 
>> 
>> 
>> 
>> 
>
>
>
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