[SR-Users] rtpproxy bridge "ie" "ei" behind NAT (like in aws EC2)

[asterisk asterisk]

Could you show the revelant codes in rtpproxy and kamailio.cfg? I am unable
to get the audio pass through from extranet to intranet as private IP
address is used after rtpproxy.

I use Kamailio 4.2 and rtpproxy in Debian wheezy. Both are installed from
repository.

On Tue, Feb 17, 2015 at 8:27 AM, Ovidiu Sas <osas at voipembedded.com> wrote:

> You could simply let the RTP traffic to flow directly between FS and
> endpoints (no need for rtpproxy).
> All you need to do is:
>  - forward the appropriate RTP ports to FS;
>  - fix the private IP in SDP by replacing it with the public IP for
> the inbound rtp streams (to FS).
>
> -ovidiu
>
> On Mon, Feb 16, 2015 at 11:30 AM, Giovanni Maruzzelli <gmaruzz at gmail.com>
> wrote:
> > dear Kamailians,
> >
> > I have Kamailio+rtpproxy in front of FreeSWITCH.
> >
> > Kamailio and FreeSWITCH are on the same private network.
> > Public Internet IP address ports are redirected to Kamailio and
> > rtpproxy (same situation as in Amazon EC2).
> > Clients comes from Internet, and make calls to Internet, SIP signaling
> > passing through FreeSWITCH (eg: A leg incoming INVITE, FreeSWITCH
> > originate an outbound B leg INVITE, and then bridge the legs).
> >
> > Using rtpproxy with -A "advertise" patch from Daniel, this topology
> > works fine in a "traditional" telco way: rtp goes from caller to
> > rtpproxy to callee, and viceversa.
> >
> > Now I want to maintain FreeSWITCH in the middle of rtp flow all the
> > time, in a pure b2bua way, so it can control and analyze the media
> > streams.
> >
> > So, I need rtpproxy to act paying attention to direction, as in
> > caller->rtpproxy->freeswitch->rtpproxy->callee (and viceversa).
> >
> > Normally I would use Kamailio multihomed and rtpproxy in bridging
> > mode. But I cannot have a NIC on the public address.
> >
> > How I can use the "ie" "ei" feature of rtpproxy in an Amazon-EC2 like
> > environment? (eg: no public address attached to machine, but ports
> > redirection from public address).
> >
> > I read this trick from Hugh Waite:
> >
> > "I have used rtpproxy (with the advertised address patch) in Amazon to
> > bridge media between internet facing and private subnets in a VPC.
> > I found that I couldn’t use different advertised addresses depending
> > on which direction the signalling was going on a single private IP
> > address. I worked around this by allocating a second private ip
> > address to the instance and used that in the ‘bridge’.
> > -A 54.86.X.X/10.0.1.15 –l 10.0.1.10/10.0.1.15"
> >
> > Can you explain how to use this trick, or another way (without
> > additional addresses is gladly accepted!) to reach the same result
> > (rtp always passing through FreeSWITCH) ?
> >
> > Thank you all in advance,
> >
> > -giovanni
> >
> > --
> > Sincerely,
> >
> > Giovanni Maruzzelli
> > Cell : +39-347-2665618
> >
> > _______________________________________________
> > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> > sr-users at lists.sip-router.org
> > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
>
> --
> VoIP Embedded, Inc.
> http://www.voipembedded.com
>
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