IPP Mail Archive: IPP> Re: New IPP Scheme

IPP> Re: New IPP Scheme

Keith Moore (moore@cs.utk.edu)
Thu, 16 Jul 1998 17:41:51 -0400

> > 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.

No, I don't think so. Implementations should default to port 631, but
people who buy these things should be able to change that default to
anything they want.

Here's how I would say this:

1. Implementations MUST support the ability to accept IPP requests on
port 631.
2. Implementations MAY support the ability to accept IPP requests on
other ports instead of, or in addition to, port 631, but only
if explicitly configured to do so by the printer administrator.