[Freeswitch-users] FS uses external IP address for Contact in 200 to internal server

[Brian West]

>> <param name="ext-rtp-ip" value="$${external_rtp_ip}"/>
>> <param name="ext-sip-ip" value="$${external_sip_ip}"/>

Change to:

<param name="ext-rtp-ip" value="autonat:$${external_rtp_ip}"/>
<param name="ext-sip-ip" value="autonat:$${external_sip_ip}"/>

/b

On Fri, May 25, 2018 at 8:15 AM, Vallimamod Abdullah <vma at vallimamod.org>
wrote:

> Hi,
>
> The ext-xxx-ip is only needed if your external IP is private and nated to
> a public one defined on your router. This setting tells freeswitch to put
> directly the public IP in the contact and the SDP.
>
> If it's not already the case, you should use a different internal profile
> (attached to your internal IP) to discuss with your IS. In this profile,
> you don't need to define any NAT setting.
>
> Best Regards,
> --
> Vallimamod Abdullah
> SIP Solutions
> vma at sip.solutions
> linkedin.com/in/vallimamod
> .
>
>
> On 25 May 2018, at 14:46, M Yudkowsky <speech at pobox.com> wrote:
>
> Hi,
>
> Thanks for your response, quite helpful.
>
> On May 25, 2018, at 03:56 , Vallimamod Abdullah <vma at vallimamod.org>
> wrote:
>
>
> <param name="inbound-proxy-media" value="true"/>
> <param name="local-network-acl" value="localnet.auto"/>
> <param name="ext-rtp-ip" value="$${external_rtp_ip}"/>
> <param name="ext-sip-ip" value="$${external_sip_ip}"/>
>
>
> These are not channel variables but profile params. So they have to be set
> on the profile configuration file under sip_profiles.
>
>
> I expect I was not clear: the params are set in sip_profiles/(profile
> name).xml, where "profile name" is a valid profile name.
>
>
> And for your case, if all your traffic is internal on this profile, remove
> the last 2 params (ext-sip-ip and est-rtp-ip) as freeswitch use them to set
> the public ip on the contact and SDP if your server is nated.
>
>
> Going back to my original diagram, let me add the external leg explicitly:
>
> IS (internal IP)  == INVITE ==> FS (internal IP)
> IS (internal IP)  <== 100 == FS (internal IP)
> IS (internal IP)  <== 183 == FS (internal IP)
>
>  FS starts a call to the external provider:
>
>                                 FS (external IP) == INVITE ==> SIP
> PROVIDER
>                                 FS (external IP) <== 200 OK == SIP
> PROVIDER
>                                 FS (external IP) == ACK ==> SIP PROVIDER
>
>  FS continues the internal call:
>
> IS (internal IP)  <== 200 OK == FS (internal IP)
>
>  But the 200 OK from FS contains, in the Contact field, the *external* IP
> address:
>  Contact: <sip:xxxxx@(external IP):5060;transport=udp>
>  As a result, the IS sends a response to the *external* IP address:
>
> IS (external IP)  == ACK ==> FS (external IP)
>
>  FS resends several 200's, which IS properly ignores.
>  Eventually FS gives up on hearing from IS and sends a
>  BYE with a Reason of 408 ACK Timeout.
>
>
> Just to check, then: is the   and ext-sip-ip somehow too aggressive, and I
> should rely on NAT and localnet.auto and other automatic discovery
> mechanisms instead? Or is this configuration correct, and I have a
> different problem?
>
>
>
> --
>  Moshe Yudkowsky
>  Disaggregate Corporation
>  2952 W Fargo
>  Chicago, IL 60645 USA
>
>  +1 773 764 8727
>   speech at pobox.com
>
>   http://www.Disaggregate.com
>   http://www.PebbleAndAvalanche.com
>
>
>
>
>
>
>
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>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
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>
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-- 

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