Internet Printing Protocol

Internet Printing Protocol
Name	Internet Printing Protocol
Abbreviation	IPP
Developers	Internet Engineering Task Force, Printer Working Group
Initial release	1990s
Latest release	RFCs

Internet Printing Protocol Internet Printing Protocol enables remote printing and management of printers over networks by defining operations, attributes, and transport bindings for print jobs. It integrates with network services and standards to provide authentication, job control, and status reporting across heterogeneous environments. IPP has been adopted in enterprise, consumer, and cloud contexts and appears in numerous printer firmware, server, and client products.

Overview

IPP specifies a client–server application protocol for submitting print jobs, querying printer capabilities, and managing queues using operations and attributes defined by standards bodies such as the Internet Engineering Task Force and incorporated into implementations by vendors like Hewlett-Packard, Apple Inc., and Microsoft. The protocol typically runs over Hypertext Transfer Protocol or HTTP/1.1 and leverages Transport Layer Security for confidentiality and integrity in many deployments. IPP supports features such as job priorities, document formats, multiple copies, and finishing options, and is often integrated with directory services like Lightweight Directory Access Protocol for printer discovery.

History and Development

Early concepts for networked printing evolved in the 1990s alongside work at the Internet Engineering Task Force and collaboration among manufacturers including Epson, Canon Inc., and Xerox Corporation. Formalization occurred through informational and standards-track documents developed by working groups associated with the Printer Working Group and the RFC Editor process. Commercial adoption expanded with the release of printer firmware supporting IPP by companies such as Hewlett-Packard and client integration in operating systems from Apple Inc. and Microsoft. Subsequent updates and extensions were influenced by security advances from organizations like Internet Society and encryption developments by contributors to OpenSSL.

Architecture and Protocol Details

IPP defines a request/response model with operations such as Print-Job, Get-Printer-Attributes, and Cancel-Job, described in normative documents maintained through the IETF standards process and reflected in RFCs authored by engineers from Hewlett-Packard, Novell, and independent contributors. The protocol binds to HTTP/1.1 for transport and uses MIME-like content types for document formats; common supported formats include PostScript, PDF, and JPEG. IPP attributes convey rich metadata including media sizes, color modes, and finishing options; these attributes are mapped to vendor-specific capabilities in firmware by manufacturers such as Brother Industries and Konica Minolta. Service discovery for IPP printers often uses Multicast DNS and DNS-SD as implemented in platforms by Apple Inc. and projects like Avahi.

Implementations and Software

Common server and client implementations include CUPS developed by Apple Inc. contributors and originally by developers from Easy Software Products, vendor firmware stacks from Hewlett-Packard, Epson, and Xerox Corporation, and open-source projects like Gutenprint. Print management suites from Novell and Microsoft have integrated IPP for interoperability with enterprise print servers. Cross-platform libraries and utilities supporting IPP appear in projects hosted by communities around GitHub and package ecosystems such as Debian and Fedora Project distributions. Cloud print gateways and services by providers like Google (company) historically bridged IPP to web services and mobile platforms from Apple Inc. and Google (company).

Security and Privacy Considerations

IPP deployments employ Transport Layer Security and authentication mechanisms such as HTTP Digest Access Authentication or enterprise single sign-on systems tied to identity providers like Microsoft Active Directory and LDAP. Threat models consider data leakage in print jobs, abuse of administrative operations, and misconfiguration that can expose sensitive documents to actors discussed in security advisories from organizations like National Institute of Standards and Technology and vendors such as Hewlett-Packard. Mitigations include access control lists, TLS client certificates, secure firmware update practices advocated by Internet Engineering Task Force working groups, and auditing integrations with SIEM products from vendors such as Splunk and IBM.

Usage and Applications

IPP is used in office environments managed by ITIL-aligned service desks, educational institutions with print quotas administered via student information systems, and public print kiosks operated in collaboration with facility managers at venues like Airports Council International-managed terminals. Vertical applications include print-on-demand publishing with workflows integrating Adobe Systems tools and cloud-based document services from providers like Google (company) and Dropbox, Inc. for mobile printing. Printer manufacturers integrate IPP into multifunction devices sold to enterprises such as Canon Inc. and Ricoh Company, Ltd. to provide scanning, faxing, and secure release features compatible with access control infrastructure from HID Global.

Standards and Compliance

The core protocol and extensions are documented in RFCs produced through the Internet Engineering Task Force process and technical reports by consortia like the Printer Working Group. Compliance programs, interoperability events, and certification testing are conducted by industry alliances including testing labs associated with organizations such as UL (company) and vendor interoperability initiatives from Hewlett-Packard and Apple Inc.. Regulatory and procurement standards in public sector deployments reference security guidelines from National Institute of Standards and Technology and procurement frameworks overseen by authorities like the General Services Administration.

Category:Network protocols