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I intend to set up OpenVPN with the port-share option on port 443.

--port-share

When run in TCP server mode, share the OpenVPN port with another application, such as an HTTPS server.

Can a network node which routers the OpenVPN traffic distinguis it from "regular" HTTPS traffic?

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up vote 2 down vote accepted

This page:

http://www.anonyproz.com/supportsuite/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=161&nav=0

suggests that a sufficiently motivated attacker can distinguish OpenVPN traffic from HTTPS.

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