[asterisk-users] UDPTL T38 via NAT

[Johann Steinwendtner]

On 2010-06-22 15:16, Remco Bressers wrote:
> On 06/22/2010 02:51 PM, Johann Steinwendtner wrote:
>> On 2010-06-22 12:36, Remco Bressers wrote:
>>> Dear list,
>>>
>>> I've got the following setup :
>>>
>>> [FAX-ATA]--[PBX LAN]--[Firewall]--[PBX WAN]-----[upstream SIP]
>>>
>>> On the PBX's we run Asterisk 1.4.33 with t38pt_udptl=yes in [general].
>>> The FAX ATA is a Teles VoIPBox with T.38 support (that works). On the
>>> PBX WAN, i see the following in udptl debug :
>>>
>>> Sent UDPTL packet to 172.16.0.156:4460 (type 0, seq 184, len 32)
>>> Got UDPTL packet from 62.180.xx.xx:36170 (type 0, seq 0, len 32)
>>> Sent UDPTL packet to 172.16.0.156:4460 (type 0, seq 185, len 32)
>>> Got UDPTL packet from 62.180.xx.xx:36170 (type 0, seq 0, len 32)
>>> Sent UDPTL packet to 172.16.0.156:4460 (type 0, seq 186, len 32)
>>> Got UDPTL packet from 62.180.xx.xx:36170 (type 0, seq 0, len 29)
>>>
>>> This means my outgoing udptl traffic is correctly translated, but
>>> somehow i'm sending 172.16.0.156 instead of my public IP address on the
>>> firewall.
>>>
>>
>>
>> Did you try t38pt_usertpsource=yes ?
>>
>
> Hi,
>
> Yes, i tried adding that to the SIP peer configuration for the FAX ATA.
> Should i put it on the PBX trunk configuration also??
>
> Remco
>
Yes.