[OpenSIPS-Users] Is NAPTR query always necessary?

[hsuan]

Hi Bogdan,

I use multi-domain support, but if I comment the multi-domain setting in
opensips.cfg the looping still happen. Would I add something in my
opensips.cfg to avoid the looping?

Thanks,
Eason



Bogdan-Andrei Iancu wrote:
> 
> Hi Eason ,
> 
> the looping happens because your OpenSIPS does not recognize the domain 
> from RURI as local domain (to be processed locally) and simply fwds it 
> based on DNS.
> 
> In your script, do you use multi-domain support? Is it based on the 
> default opensips cfg ?
> 
> Regards,
> Bogdan
> 
> hsuan wrote:
>> Hi Bogdan,
>>
>> Thanks for your feedback.
>>
>> Yes, I can find the sip request to itself on LO interface. 
>>
>> But I don't know what setting in opensips server will cause SIP looping.
>> Could you spell out more precisely? Why the sip looping only happens in
>> the
>> domain is not numeric? Do you mean it's not the DNS issue? I am a little
>> confused.
>>
>> Best regards,
>> Eason
>>
>>
>>
>> Bogdan-Andrei Iancu wrote:
>>   
>>> Hi Eason,
>>>
>>> according to RFC3263 ( SIP: Locating SIP Servers), if the explicit 
>>> protocol and port is contain by the destination SIP URI, the proxy must 
>>> try to do NAPTR and SRV lookups to discover what protocol and port to
>>> use...
>>> If these records are missing, the default value ( UDP + 5060) are
>>> assumed.
>>>
>>> these DNS lookups are done each time a requests is routed out (if not 
>>> using IPs).
>>>
>>> What happens in your case is a SIP looping on the proxy (sending the 
>>> request to itself). You can check this with tcpdump/ngrep/wireshark , 
>>> watching the traffic on LO interface.
>>>
>>> Regards,
>>> Bogdan
>>>
>>>
>>> hsuan wrote:
>>>     
>>>> Hi all,
>>>>
>>>> I am newbie on opensips, I wonder if the NAPTR is necessary in some
>>>> case? 
>>>> When my sip domain is set to FQDN, the opensips server will send NAPTR
>>>> query
>>>> to DNS server. But there is no NAPTR supported DNS in my environment,
>>>> although the opensips server will get the ip and port eventaully. 
>>>> Why the opensips server will send NAPTR query again and again even
>>>> though
>>>> it
>>>> already get the ip and port from DNS? When the opensips server get into
>>>> the
>>>> NAPTR loop, the user will get 483 too many hops finally and will not
>>>> able
>>>> to
>>>> register to opensips server. Once if the sip domain is set to ip
>>>> address,
>>>> the user will register successfully. Is there any way to disable the
>>>> NAPTR
>>>> query in opensips server? Please advice.
>>>>
>>>> Best regards,
>>>> Eason
>>>>
>>>>
>>>>   
>>>>       
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>>> Users at lists.opensips.org
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>>>
>>>
>>>     
>>
>>   
> 
> 
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