- From: <PETER_E_MELLQUIST@hp-roseville-om3.om.hp.com>
- Date: Mon, 1 Jun 1998 19:54:21 +0100 (BST)
- To: manros@cp10.es.xerox.com
- Cc: http-wg@cuckoo.hpl.hp.com, ipp@pwg.org
Regarding item #2, Use of alternative HTTP ports, other than port 80, effects the ability to move through proxies and firewalls. Using alternative port #'s will require reconfiguration of security infrastructure in order to allow for HTTP connections. HP has gone through similar work in the definition and standardization of HTTP port 280 for Web Based Management Purposes ( see IANA port list ). Currently port 280 is IANA approved for usage of HTTP for network management. This works fine for Intranet usage, but issues as described above result when operating in a secure environments. The other issue is that of configuring HTTP servers and proxies to listen on alternative port #s. While easy to do programatically, not all commercial HTTP servers allow listening on multiple ports concurrently. Considering these two issues, partitioning of the URI space for IPP on HTTP port 80 or HTTP-S (HTTP/(SSL |TLS)) on port 443 makes better sense. Peter ______________________________ Reply Separator _________________________________ Subject: IPP> Implications of introducing new scheme and port for e Author: Non-HP-manros (manros@cp10.es.xerox.com) at HP-Roseville,mimegw4 Date: 6/1/98 10:20 AM Hi, As most of you know already, the Internet Printing Protocol (IPP) WG has suggested using HTTP as "transport", with the payload in the form of a MIME object passed with the POST method. As part of the onging IESG review process, the Application Area Director Keith Moore has suggested to distinguish IPP traffic from "normal" HTTP traffic by: 1) the introduction of a new scheme called "ipp" 2) the introduction a new default port number for IPP servers. Before the IPP WG responds to those suggestions, the IPP WG would like to get some advice from the HTTP WG on the implications of such a change. In particular, we want some feedback on how easy or difficult it would be to configure existing web servers to accomodate the suggested changes. Please note that many printer vendors are not in the business of developing web servers or HTTP servers and are dependent on getting those compoments from other vendors. Please respond back to the IPP DL at: ipp@pwg.org Thanks, Carl-Uno Manros Chair of the IETF IPP WG
Received on Tuesday, 2 June 1998 08:49:20 UTC