From: Juliusz Chroboczek <jch@irif.fr>
To: "Michael Ströder" <michael@stroeder.com>
Cc: "galene@lists.galene.org" <galene@lists.galene.org>
Subject: [Galene] Re: STUN and TURN
Date: Fri, 08 Jan 2021 17:41:04 +0100 [thread overview]
Message-ID: <87eeiv755r.wl-jch@irif.fr> (raw)
In-Reply-To: <6f88f2e0-7b06-953d-ed8b-53481381a0f0@stroeder.com>
> So I wonder whether using stun: and turn: URLs in the ICE config make sense.
It's not useful, it will only slow down connection establishment. Every
TURN server acts as a STUN server, if you have a TURN server it will be
used for STUN candidates.
> Do the browsers prefer STUN-trickled addresses over relaying via TURN if
> both are configured.
Yes, Rosenberg is competent ;-) RFC 8445 Section 5.1.2.2:
The RECOMMENDED values for type preferences are 126 for host
candidates, 110 for peer-reflexive candidates, 100 for server-
reflexive candidates, and 0 for relayed candidates.
("Server-reflexive" means STUN, "relayed" means TURN.)
Browsers are free to tweak the priorities, and chrome correctly sets
a slightly higher priority for Ethernet than for WiFi:
When choosing type preferences, agents may take into account factors
such as latency, packet loss, cost, network topology, security,
privacy, and others.
-- Juliusz
prev parent reply other threads:[~2021-01-08 16:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-08 16:08 [Galene] " Michael Ströder
2021-01-08 16:41 ` Juliusz Chroboczek [this message]
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