[SR-Users] WebRTC - XOR-MAPPED-ADDRESS and bridge mode

Kelvin Chua kelchy at gmail.com
Thu Nov 21 01:08:15 CET 2013

just an update to this issue, this was caused by rtpproxy not answering to
a stun binding request but rather relaying it downstream. (for which
asterisk as pstn terminator replied with a binding success)

i wonder how difficult it is to add stun into rtpproxy? mediaproxy-ng
should work but it does not support bridge mode. any other options?

time to move this discussion to the other mailing list :)
On Nov 19, 2013 4:50 PM, "Kelvin Chua" <kelchy at gmail.com> wrote:

> here is the scenario:
> kamailio 4.0.4 running in bridge mode
> eth0 :
> eth1 :
> a call comes in from ice enabled webrtc client (chrome) from public
> internet,
> kamailio processed the call, no audio.
> if i replace kamailio with asterisk, audio ok.
> upon investigating using wireshark, i found out that chrome sends a
> "Binding Request" for the IP/port in ICE candidate. Kamailio/rtpproxy sends
> back
> Binding Success XOR-MAPPED-ADDRESS but the IP is the internal one
> this is not right, the response should be the remote IP/port, not the
> local IP/port
> Kelvin Chua
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