[Freeswitch-users] RTP Triple NAT Traversal

[Brian West]

Your client should be doing the NAT Traversal in this case, using STUN to
discover its public IP, then using that IP in the packets, along with
enabling rport on the client side, that would help this greatly, FreeSWITCH
will auto adjust the rest if you can get that media part to work.



On Tue, Nov 11, 2014 at 11:11 AM, Bill Ross <rossbcan at gmail.com> wrote:

> Folks
>
>
>
> FS: 1.4.13 / OpenWrt
>
>
>
> Topology
>
>
>
> SIP Phone           <-> WIFI AP / NAT <->   Cloud <->            Router /
> NAT <->             Router / NAT <-> FS
>
>
>
> 192.168.10.x                                                       Public
> IP               192.168.1.x                         10.0.0.128
>
>
>
> The SIP packets traverse the NAT chain correctly.
>
> The RTP packets from / to Phone are from / to 192.168.10.x, so, not
> getting through (because private N/W addresses embedded in SIP messaging)
>
>
>
> I am considering the following methods of handling this, but, before doing
> a lot of work / research, is there a better method?
>
>
>
> 1 - Using firewall rules (somehow, if possible, connection tracking?) to
> SNAT/DNAT packets to/from private network ranges which are not local lan
> range
>
> 2 – (appears simplest) Using channel variables (addresses) from SIP
> messaging to alter addresses prior to bridge.
>
>
>
> Any thoughts?
>
>
>
> Thanks;
>
> Bill Ross
>
>
>
>
>
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-- 

*Brian West*
brian at freeswitch.org


*Twitter: @FreeSWITCH , @briankwest*
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