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Re: [rtcweb] WGLC for draft-ietf-rtcweb-ip-handling

Andy Hutton <andyhutton.ietf@gmail.com> Tue, 03 April 2018 14:56 UTC

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From: Andy Hutton <andyhutton.ietf@gmail.com>
Date: Tue, 03 Apr 2018 15:56:47 +0100
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To: Philipp Hancke <fippo@goodadvice.pages.de>
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Subject: Re: [rtcweb] WGLC for draft-ietf-rtcweb-ip-handling
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On 3 April 2018 at 14:17, Philipp Hancke <fippo@goodadvice.pages.de> wrote:
> Am 03.04.2018 um 11:14 schrieb T H Panton:
>>
>> In case anyone thinks this issue will go away if we ignore it:
>>
>>
>> https://www.theregister.co.uk/2018/03/29/almost_a_quarter_of_vpns_tested_leak_ip_addresses/
>> <https://www.theregister.co.uk/2018/03/29/almost_a_quarter_of_vpns_tested_leak_ip_addresses/>
>
>
> It turned out the issue in this case is
> a) browser extensions that add a proxy server calling themselves a "VPN"
> b) said browser extensions being unaware of the Chrome Extension API to set
> mode 4 which prevents UDP from being used if a proxy server is set.
>

The reference to mode 4 forced me to read that part of the draft again
and now I have a question:

In the description of mode 4
*https://tools.ietf.org/html/draft-ietf-rtcweb-ip-handling-06#section-5.2)
what is meant by "or the WebRTC implementation does not support UDP
proxying"?

Does "UDP Proxying" refer to the return proxy mechanism, a network
specific TURN server, or something else?

Andy

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