[Freeswitch-users] NAT issues - Outbound Call drops after ~30 seconds

Tue Mar 20 20:35:26 MSK 2012

My thought at this stage is that the ATA is trying to send the ACK directly
and not to FreeSWITCH using the Contact header. If I recall correctly, GS's
can be configured with both a registrar and an outbound proxy. Try setting
the outbound proxy to the FreeSWITCH box, see what happens.

On 20 March 2012 17:15, Michael Collins <msc at freeswitch.org> wrote:

> This is why I love Wireshark so much! Look at this purdee graph it makes:
>
>
>
>
> See all those 200 OK's that your FS is sending to the Grandstream? Guess
> what your GS is sending in response to those: NADA! If you look at the BYE
> that FS sends to the GS you'll even see the reason:
>
> SIP;cause=408;text=\"ACK Timeout\"
>
> FS never gets an ACK back from the GS. So the question is: why? I'm
> unfamiliar with the GS so I'll have to defer to those with more experience
> than I. However, I think you'll find that tcpdumps and analyzing w/
> Wireshark is extremely helpful. (Open the pcap, click "Telephony > VoIP
> calls" and then a new dialog opens. In this case it shows two calls -
> meaning two call legs. Click "Select All" then click "Flow" and you'll get
> the cool graph. Click around and see what other stuff does. :)
>
> I'm thinking of doing a FreeSWITCH conference call presentation on the
> subject of collecting pcaps and doing Wireshark analysis. Let me know if
> you guys think that's a good presentation.
>
> -MC
>
>
>
> On Tue, Mar 20, 2012 at 10:00 AM, Brian Foster <bdfoster at endigotech.com>wrote:
>
>> Andrew,
>>
>> root at homeserver:/usr/local/stund# ./client stunserver.org
>> STUN client version 0.97
>> Primary: Independent Mapping, Independent Filter, preserves ports, will
>> hairpin
>> Return value is 0x000003
>>
>> http://da1.endigovoip.com/dump.pcap
>>
>> Kristian,
>>
>> http://pastebin.freeswitch.org/18708
>>
>> Michael,
>>
>> I did replace the IP's for security purposes, but now I've realized that
>> it's needed and it's not really that big of a deal. I'll end up changing
>> the Flowroute creds after this is fixed up. The prior siptrace is exactly
>> one call (two legs). I don't think it's a carrier issue, as I've tried
>> calling a buddy's server direct sip with the same issues.
>>
>> -BDF
>>
>> On Tue, Mar 20, 2012 at 11:34 AM, Michael Collins <msc at freeswitch.org>wrote:
>>
>>> We have scores of machines behind NAT talking to Flowroute with no
>>> problems, so there's got to be something potentially non-obvious but easy
>>> that needs to be set/unset. I noticed in the SIP trace that there are
>>> several calls. It's hard to know what's what. I think your best bet is a
>>> pcap analyzed with Wireshark, as was mentioned elsewhere in this thread. I
>>> also noticed that you redacted IP addrs - you won't be able to do this with
>>> a pcap. If security is an issue then I'd say get the pcap and let us know
>>> here on the list, then those who can have a look will email you privately
>>> and you can send the pcap file to them.
>>>
>>> -MC
>>>
>>>
>>> On Mon, Mar 19, 2012 at 12:12 PM, Brian Foster <bdfoster at endigotech.com>wrote:
>>>
>>>> Alright, so I admit... I'm a little rusty when it comes to NAT, etc.
>>>> I've only set up FS so far on machines with no NAT, so this is sort of a
>>>> new experience for me.
>>>>
>>>> I have a FreeSWITCH server located on the same local network as all of
>>>> my phones here at the house. When I try to make a call to Flowroute, after
>>>> about 30 seconds the call drops. It also does the exact same thing when I
>>>> call a buddy's server directly via SIP.
>>>>
>>>> Here's a siptrace of the call (I didn't think that the actual FS log
>>>> would be much help):
>>>> http://pastebin.freeswitch.org/18697
>>>>
>>>> ...and here's a paste of 'sofia status':
>>>> http://pastebin.freeswitch.org/18698
>>>>
>>>> ...and just for good measure, here's a paste of vars.xml:
>>>> http://pastebin.freeswitch.org/18699
>>>>
>>>>
>>>> --
>>>> Brian D. Foster
>>>> Endigo Computer LLC
>>>> Email: bdfoster at endigotech.com
>>>> Phone: 317-800-7876
>>>> Indianapolis, Indiana, USA
>>>>
>>>> This message contains confidential information and is intended for
>>>> those listed in the "To:", "CC:", and/or "BCC:" fields of the message
>>>> header. If you are not the intended recipient you are notified that
>>>> disclosing, copying, distributing or taking any action in reliance on the
>>>> contents of this information is strictly prohibited. E-mail transmission
>>>> cannot be guaranteed to be secure or error-free as information could be
>>>> intercepted, corrupted, lost, destroyed, arrive late or incomplete, or
>>>> contain viruses. The sender therefore does not accept liability for any
>>>> errors or omissions in the contents of this message, which arise as a
>>>> result of e-mail transmission. If verification is required please request a
>>>> hard-copy version.
>>>>
>>>>
>>> _________________________________________________________________________
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>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> 
>>> 
>>>
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>>>
>>
>>
>> --
>> Brian D. Foster
>> Endigo Computer LLC
>> Email: bdfoster at endigotech.com
>> Phone: 317-800-7876
>> Indianapolis, Indiana, USA
>>
>> This message contains confidential information and is intended for those
>> listed in the "To:", "CC:", and/or "BCC:" fields of the message header. If
>> you are not the intended recipient you are notified that disclosing,
>> copying, distributing or taking any action in reliance on the contents of
>> this information is strictly prohibited. E-mail transmission cannot be
>> guaranteed to be secure or error-free as information could be intercepted,
>> corrupted, lost, destroyed, arrive late or incomplete, or contain viruses.
>> The sender therefore does not accept liability for any errors or omissions
>> in the contents of this message, which arise as a result of e-mail
>> transmission. If verification is required please request a hard-copy
>> version.
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
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>>
>>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
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>
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-- 
Andrew Cassidy BSc (Hons) MBCS
Managing Director; Cassidy Web Services Ltd
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