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

[Andrew Cassidy]

tcpdump -i <interface> -s 65535 -w <some-file>


tcpdump -s 65535 -w dump.pcap

That should do the trick, but you can add port filters if you'd prefer. If
you do, please include both sip and rtp traffic. The dump.pcap file will be
compatible with wireshark to make analyzing it a little easier.

2012/3/20 Andrew Cassidy <andrew at cassidywebservices.co.uk>

> ---------- Forwarded message ----------
> From: "Andrew Cassidy" <andee at bytz.co.uk>
> Date: Mar 20, 2012 8:55 AM
> Subject: Re: [Freeswitch-users] NAT issues - Outbound Call drops after ~30
> seconds
> To: "FreeSWITCH Users Help" <freeswitch-users at lists.freeswitch.org>
>
> When we get a solution (as I'm sure we will) Can we get a guide of things
> to try put up on the wiki? I've seen the same question asked at least twice
> already this week.
>
> I'll find the command line to do a more detailed packet dump that can be
> loaded into wireshark for further analysis. The main thing I'm wondering is
> if Nat is doing something funny with rewriting the rtp and rtcp port
> numbers.
>
> What type of NAT do you have? You can use WinStun or another basic stun
> client to find out.
> On Mar 20, 2012 6:07 AM, "Brian Foster" <bdfoster at endigotech.com> wrote:
>
>> Anton,
>>
>> I'm not really a pro at reading those, but I did post it here:
>>
>> http://da1.endigovoip.com/dump.txt
>>
>> ...I'm not sure if that will tell much. Where it says
>> bdfoster-Precision-WorkStation-490, that is the FS server (192.168.1.79),
>> the ATA is on 192.168.1.80 (Grandstream HT286) This problem has also
>> occurred using a SPA921 and another HT286, all on the same LAN connected to
>> the same server, etc.
>>
>> -BDF
>>
>> 2012/3/20 Anton Kvashenkin <anton.jugatsu at gmail.com>
>>
>>> Try to catch RTP streams
>>>
>>> tcpdump -i eth0 portrange 16384-16406
>>>
>>> and see what happens.
>>>
>>>
>>> 20 марта 2012 г. 6:14 пользователь Brian Foster <bdfoster at endigotech.com
>>> > написал:
>>>
>>> Yea I know what you're talking about. That has indeed been switched off
>>>> on the RG. For reference purposes, the Residential Gateway is a 2wire
>>>> AT&T-branded Uverse DSL modem/wireless router with a 4 port switch. I've
>>>> also got two 8 port netgear prosafe switches. Phones and server are on the
>>>> same subnet/netmask. Very simple network setup. No VLANS, etc. This was
>>>> indeed working with Asterisk, so I'm almost positive it's a configuration
>>>> issue with FreeSWITCH.
>>>>
>>>> If there's a need to look at more than the files/logs I've pb'd, please
>>>> let be know!
>>>>
>>>> -BDF
>>>> On Mar 19, 2012 9:20 PM, "Patrick Lists" <
>>>> freeswitch-list at puzzled.xs4all.nl> wrote:
>>>>
>>>>> On 20-03-12 00:10, Brian Foster wrote:
>>>>> > UPnP isn't available on this network. Ports 16384-16406 are
>>>>> forwarded to
>>>>> > the machine from the router. Port range in switch.conf.xml reflects
>>>>> > that. Also 5080 is forwarded from the router to the server.
>>>>> >
>>>>> > Both of those variables (ext-sip-ip and ext-rtp-ip) are set to the
>>>>> stun
>>>>> > server, see pastebin 18699 (third link in original email).
>>>>>
>>>>> If the (ADSL) router has a (for lack of a better term cause I can't
>>>>> remember) "SIP helper" app, try disabling it. Similar to the Cisco
>>>>> "SMTP
>>>>> Fixup" functionality which does an excellent job at the opposite.
>>>>>
>>>>> Regards,
>>>>> Patrick
>>>>>
>>>>>
>>>>> _________________________________________________________________________
>>>>> Professional FreeSWITCH Consulting Services:
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>>>>> http://www.freeswitchsolutions.com
>>>>>
>>>>> 
>>>>> 
>>>>>
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>>>>
>>>>
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>>>> http://www.freeswitchsolutions.com
>>>>
>>>> 
>>>> 
>>>>
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>>>
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>>> 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
>>
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>>
>> 
>> 
>>
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-- 
Andrew Cassidy BSc (Hons) MBCS
Managing Director; Cassidy Web Services Ltd
T: 03300 100 960 F: 03300 100 961
E: andrew at cassidywebservices.co.uk
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