Hello Greg. I took some time to gather information. First of all, I see that you are really active on our mailing lists, and your help is very valuable, thanks.
When we activate a sip.linphone.org account with the assistant, ICE is
always on, and the STUN server is configured to stun.linphone.org
The UI is misleading in the settings view of Linphone Desktop, because
the default params are overwritten by the account params ("enable ICE"
in the network settings view is overwritten by the value in "sip
accounts" > "edit" > "NAT".
I'm thinking about making the UI clearer, and we working on it step
after step when we have enough time (apart from mailing list responses,
and daily work).
So, ICE and STUN are enabled and set for sip.linphone.org accounts, but
not for others providers by default, because most of PSTN gateways
doesn't understand ICE, and we do not have any clue about their eventual
TURN or STUN server.
I think that it would be nice to use a TURN server if we can't transfer
media normally. Unfortunately, stun.linphone.org is only a STUN server now.
We are thinking about setting up an official TURN server for
sip.linphone.org, because the media-relay done by Flexisip proxy isn't
really a standard.
It has some limitations which are leading to random bugs when clients
have a double IPv4/IPv6 connectivity.
You will be notified by a newsletter on the website if we eventually set
it up.
Regards,
Peio Rigaux
Junior Software Engineer
Belledonne Communications, the company behind Linphone
Linphone.org <https://linphone.org/>
Le 21/04/2020 à 17:56, Greg Troxel a écrit :
> I advised someone else to install linphone, and have a question about
> ICE.
>
> 0) ICE/TURN
>
> Separately from all questions about defaults and global vs per-account
> settings:
>
> It seems obvious that typical linphone users should configure ICE on,
> and TURN on, and that the default stun.linphone.org is a reasonable
> choice of STUN and TURN server. Correct?
>
>
> 1) The person doing the install told me that ICE did not default to
> enabled. This is with some blend of beta and stable on windows and
> linux. ICE being off seems strange to me, as the firewall/NAT is
> sufficiently troublesome that in general, calls between two impaired
> devices are likely to fail without ICE.
>
> Is it intended that ICE is default off? If, so, why?
>
> 2) STUN server
>
> stun.linphone.org seems to be a usable STUN server, and perhaps TURN
> also. Is this true, for STUN and for TURN? Is there any authentication
> hidden in the linphone programs?
>
> Or is stun.linphone.org open and usable, but it's also true the app has
> a place for TURN user/password so that people can configure the use of
> their own, non-public TURN servers?
>
> 3) ICE and TURN: global settings
>
> In the Android app network tab, there is a separate "enable ICE" and
> "enable TURN". (I can almost understand why someone might want ICE and
> not TURN, but I wonder what the intent is in terms of defaults.)
>
> In the Mac beta, in the network tab, there are similarly separate
> settings for ICE and TURN.
>
> 4) ICE and TURN: per-account settings
>
> In the Android app per-account settings, there is an enable for ICE, and
> a STUN/TURN server. Does this override the app-wide defaults?
> If so, why does the app-wide default exist? Or is that just copied into
> new Accounts? Why isn't there an "enable TURN" per account also?
>
> In the mac beta, there are per-account settings for ICE and TURN. Same
> question about how global settings relate to per-account, but in this
> case there is a per-account TURN setting.
>
>
>
> Absent answers here I probably will file bugs about most of this.
>
> Thanks,
> Greg
>
> _______________________________________________
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> Linphone-users@nongnu.org
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