[Kamailio-Users] Keep-alive implementation

[Daniel-Constantin Mierla]

Hello,

On 06/10/2009 11:20 AM, kokoska rokoska wrote:
> Iñaki Baz Castillo napsal(a):
>   
>> El Martes, 9 de Junio de 2009, Alex Balashov escribió:
>>     
>>> Iñaki Baz Castillo wrote:
>>>       
>>>> El Martes, 9 de Junio de 2009, Saúl Ibarra escribió:
>>>>         
>>>>> Nevertheless, I would keep it active, and set ping_nated_only to 1, so
>>>>> you just ping clients which are known to be behind NAT.
>>>>>           
>>>> The only problem with it is when a fuc**ng SIP ALG enabled router takes
>>>> place. It will modify the request so it'll look as coming from public IP
>>>> (NAT cannot be detected in Kamailio), but most of these infernal routers
>>>> don't mantain the keepalive so the input traffic is closed after UDP
>>>> "connection" expires in the router.
>>>>         
>>> Yep.  Infernal - well said!
>>>       
>> This is my personal battle against SIP ALG routers:
>>   http://www.voip-info.org/wiki/view/Routers+SIP+ALG
>>
>> Please, feel free to add any useful information about infernal routers with 
>> SIP ALG enabled.
>>
>> Thanks a lot :)
>>
>>     
>
> SIP ALG routers are big pain, at least for me :-)
>
> What I'm trying to do is automagically detect users behind such a stupid
> routers (analyzing INVITEs and REGISTERs in sip-dump) and automatically
> send them e-mails aksing to disable SIP ALG.
> Just my 2c...
>   
some do not offer any such option, even I googled a lot some time ago, I 
couldn't get a solution for a siemens gigaset se36. If someone knows, 
would be great.

However, it was easy to trick by listening on 5062 with kamailio and 
pointing my phones to use that dst port. I haven't tried with tcp, 
another option that should be tried with those algs.

Cheers,
Daniel

-- 
Daniel-Constantin Mierla
http://www.asipto.com/