RFC 1919: Classical versus Transparent IP Proxies

This document explains "classical" and "transparent" proxy techniques and attempts to provide rules to help determine when each proxy system may be used…

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Outgoing relationships (2 related RFCs)

Informative reference — RFC 1597: Address Allocation for Private Internets
Informative reference — RFC 1383: An Experiment in DNS Based IP Routing

Incoming relationships (3 related RFCs)

Informatively referenced by — RFC 8803: 0-RTT TCP Convert Protocol
Informatively referenced by — RFC 5383: Deployment Considerations for Lemonade-Compliant Mobile Email
Informatively referenced by — RFC 7974: An Experimental TCP Option for Host Identification