Request for Comments RFC8517

An Inventory of Transport-Centric Functions Provided by Middleboxes: An Operator Perspective  Feb 1, 2019

This document summarizes an operator's perception of the benefits that may be provided by intermediary devices that execute functions beyond normal IP forwarding. Such intermediary devices are often called "middleboxes".

RFC 3234 defines a taxonomy of middleboxes and issues in the Internet. Most of those middleboxes utilize or modify application- layer data. This document primarily focuses on devices that observe and act on information carried in the transport layer, and especially information carried in TCP packets.


Internet architecture NAT Path Layer UDP Substrate Service Function TCP QUIC address sharing firewall service delivery transport

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Source:  IETF Last updated:  May 30, 2019

From RFC Editor, a database of the Internet Engineering Task Force. This record may not reflect the most current and accurate data available from the IETF.