[Freeswitch-users] SRTP breaks my TLS session

Emrah lists at kavun.ch
Tue Mar 1 14:45:05 MSK 2016


Hello all,
Pinging the list in search of brilliant minds for more recommendations on how to solve this overwhelmingly frustrating issue.

I just love FS and all it lets me accomplish. But this bug and the unpredictability and inability to effectively troubleshoot just leaves a bad impression, accentuated by the fact that no one seems to care about it. I call it a bug because I do not experience this issue with other SIP servers.

Who is available to exchange SIP credentials in order to cross-test this? Especially if you believe you are immunized!

Best,
Emrah

> On Feb 28, 2016, at 7:33 PM, Emrah <lists at kavun.ch> wrote:
> 
> Hello there,
> I can confirm that a PCAP gives me a bunch of TLS packets.
> How do you suggest debugging this?
> 
> Thanks!
>> On Feb 26, 2016, at 10:36 AM, Emrah <lists at kavun.ch <mailto:lists at kavun.ch>> wrote:
>> 
>> Thanks for this. 
>> 
>> This isn’t just a yealink thing. I’ve encountered sporadic issues with soft phones and other desk phones as well.
>> 
>> I didn’t use the PCap capture feature because I had assumed it would give me a bunch of TLS packets. I’ll test that and revert back.
>> 
>> How can we explain that I have more calls failing if I register multiple accounts?
>> 
>> Emrah
>> 
>>> On Feb 26, 2016, at 6:37 AM, Mario G <mario_fs at mgtech.com <mailto:mario_fs at mgtech.com>> wrote:
>>> 
>>> You may want to run a pcap trace on the Yealink. It’s under settings->Configuration. Start/test/export.
>>> 
>>>> On Feb 25, 2016, at 3:35 PM, Brian West <brian at freeswitch.org <mailto:brian at freeswitch.org>> wrote:
>>>> 
>>>> Sounds like there may be a bug in the yealink if packet size is of issue on TCP/TLS connections.
>>>> 
>>>> On Thu, Feb 25, 2016 at 5:13 PM, Emrah <lists at kavun.ch <mailto:lists at kavun.ch>> wrote:
>>>> Hello list,
>>>> I thought I had solved this issue by reducing my codec list  to a minimum, but it still persists, unfortunately. This was to reduce the TLS packet size.
>>>> Anytime I enable SRTP on my phones, outgoing calls will randomly fail. The problem goes away when I disable SRTP. I only work over TLS.
>>>> Incoming calls work reliably with or without SRTP.
>>>> 
>>>> How do you suggest debugging this?
>>>> I tried setting up a fresh instance of FS but the issue persists.
>>>> Now. It should be noted that calls fail sensibly more often when I have more than one account registered on the same server with the same device.
>>>> 
>>>> Any suggestion is welcome. Have you experienced this? 
>>>> 
>>>> I’m running FreeSWITCH Version 1.6.5 on Debian. My phone in this case is a Yealink SIP-T46G running firmware 28.80.0.95.
>>>> 
>>>> E
>>>> 
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>>>> 
>>>> -- 
>>>> Brian West
>>>> brian at freeswitch.org <mailto:brian at freeswitch.org>
>>>> 
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>>>> 
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>>>> 
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>>> 
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>>> 
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>> 
> 

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