IPP Mail Archive: Re: IPP> Re: Implications of introducing new scheme and port

IPP Mail Archive: Re: IPP> Re: Implications of introducing new scheme and port

Re: IPP> Re: Implications of introducing new scheme and port

Keith Moore (moore@cs.utk.edu)
Tue, 09 Jun 1998 15:48:44 -0400

> so then would the advice that we give
> to proxy admins to filter/allow IPP to
> watch for URLs on port XXX ?

In my example, XXX is the reserved IPP port. So if the admins want to
block outgoing IPP traffic, they tell their routers or firewalls to
not transmit requests to anything on port XXX.

Of course, anyone with an HTTP server on port XXX will be unreachable
from behind such a firewall, and the filter won't block access to IPP
servers on other ports. But that's an inherent limitation of firewalls -
they can't really filter out all unwanted traffic, they can only filter
out most of it.

As long as IPP is run on a separate port, I'm pretty ambivalent
about PRINT vs. POST.

Keith