|Plus -- Discussion of a Path Layer UDP Substrate (PLUS) protocol for in-band management of in-network state for UDP-encapsulated transport protocols.
PLUS aims to define a new Path Layer UDP Substrate (PLUS) protocol, that supports in-band management of in-network state (e.g. on firewalls and NAT boxes) in a transport-independent way. PLUS will, in effect, provide a common "wire image" for new, encrypted transport protocols. PLUS is intended to be deployed underneath encrypted transport protocols, which protect the confidentiality of their payloads and most of their headers, and can protect the integrity of those headers exposed to the network. Given current deployment practices and the constraints they impose on deploying new protocols, PLUS will be defined as a shim layer, on top of UDP and underneath the actual transport protocol.
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