[Users] privacy=full and contact hf

Wolfgang Hottgenroth woho at hottis.de
Mon Jan 30 20:13:11 CET 2006


Yep, you indeed understand exactly what I'm about to try, replacing the
contact by something recognizable ... I was wondering whether someelse
was face the same problem.

Thanks,
Wolfgang


Bogdan-Andrei Iancu wrote:
> Hi,
> 
> I see what you are trying to do. I have some idea about masking the
> contact hdr, but you still have to deal with VIA :D.....
> 
> about Contact...since the contact provided by the GW is the same (let's
> assume that), before forwarding to the foreign proxy, you may replace
> the GW contact with a contact pointing to your server and containing a
> token easy to recognize (maybe a username?).
> On the way back, if you find the funny contact you inserted (which will
> be RURI or Route), you have to restore it to the GW contact....
> 
> never tried this, but it might work....
> 
> regards,
> bogdan
> 
> Wolfgang Hottgenroth wrote:
> 
>> Hi,
>>
>>
>> you're right, but here the source is the GW and the destination is
>> another SIP proxy with SIP phones behind it. And since we are
>> terminating calls out of the PSTN to this other SIP proxy, ran by a
>> company without voice-license, I need to remove any hint to the identity
>> of the caller before handing over the call to that second SIP proxy.
>>
>>
>> Wolfgang
>>
>>
>>
>> Bogdan-Andrei Iancu wrote:
>>  
>>
>>> Hi Wolfgang,
>>>
>>> if the destination is a GW and you set a RPID hdr, you do not need to
>>> remove the contact and FROM - the GW will silently ignore them.
>>>
>>> regards,
>>> Bogdan
>>>
>>> Wolfgang Hottgenroth wrote:
>>>
>>>   
>>>
>>>> Really sure that there is no way only using openser? I don't want to
>>>> deploy that fat beast additionally just for a single feature.
>>>>
>>>> Or is there something I haven't considered yet?
>>>>
>>>>
>>>> Thanks,
>>>> Wolfgang
>>>>
>>>>
>>>>
>>>>
>>>> Klaus Darilion wrote:
>>>>
>>>>
>>>>     
>>>>
>>>>> If you need full privacy, then it is better to use a B2BUA like
>>>>> Asterisk.
>>>>>
>>>>> regards
>>>>> klaus
>>>>>
>>>>> Wolfgang Hottgenroth wrote:
>>>>>
>>>>>  
>>>>>
>>>>>       
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>>
>>>>>> before forwarding a call (INVITE) from the PSTN with flag
>>>>>> "privacy=full"
>>>>>> in the Remote-Party-ID hf to a none-voice-licensed carrier I need to
>>>>>> make sure that the calling party number is completely wiped out from
>>>>>> the
>>>>>> SIP requests.
>>>>>>
>>>>>> I see this number at three places: the Remote-Party-ID hf itself, the
>>>>>>
>>>>>>   
>>>>>>         
>>>>>>
>>>>>>> From hf and the Contact hf.
>>>>>>>                
>>>>>>
>>>>>> The Remote-Party-ID hf can simply be dropped or replaced by something
>>>>>> anonymous.
>>>>>>
>>>>>> The From hf can be rewritten using uac_replace_from.
>>>>>>
>>>>>> But what about the Contact hf? This field is, as far as I can see,
>>>>>> required for routing purposes, to tell the called party side where to
>>>>>> send replies. So, if I would manage it to rewrite the field, I would
>>>>>> have to make sure, the replies sent to the rewritten address once
>>>>>> again
>>>>>> will be rewritten to target for the meant destination.
>>>>>>
>>>>>> Is there a best practice for this item?
>>>>>>
>>>>>>
>>>>>>
>>>>>> Thanks,
>>>>>> Wolfgang
>>>>>>
>>>>>> _______________________________________________
>>>>>> Users mailing list
>>>>>> Users at openser.org
>>>>>> http://openser.org/cgi-bin/mailman/listinfo/users
>>>>>>
>>>>>>
>>>>>>            
>>>>
>>>>
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>>>>
>>>>
>>>>
>>>>     
>>
>>
>>  
>>
> 





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