SOCKS Protocol Version 6

Document Type Expired Internet-Draft (individual)
Authors Vladimir Olteanu  , Dragos Niculescu 
Last updated 2021-05-06 (latest revision 2020-11-02)
Replaces draft-intarea-olteanu-socks-6, draft-olteanu-socks-6
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The SOCKS protocol is used primarily to proxy TCP connections to arbitrary destinations via the use of a proxy server. Under the latest version of the protocol (version 5), it takes 2 RTTs (or 3, if authentication is used) before data can flow between the client and the server. This memo proposes SOCKS version 6, which reduces the number of RTTs used, takes full advantage of TCP Fast Open, and adds support for 0-RTT authentication.


Vladimir Olteanu (
Dragos Niculescu (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)