Hi,Daniel
   I have according to your instruction modify the config file,but it remain as before. following is my modify part:
 
# -- nathelper
modparam("nathelper", "rtpproxy_sock", "udp:127.0.0.1:7722")  #Is 127.0.0.1 should modify my internet ip? 
modparam("nathelper", "natping_interval", 30)
modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "sipping_bflag", 7)
modparam("nathelper", "sipping_from", "sip:pinger@kamailio.org") #pinger@kamailio.org no modify? 
modparam("registrar|nathelper", "received_avp", "$avp(i:80)")
modparam("usrloc", "nat_bflag", 6)
 
   Can you tell my how to find the kamailio's log file(it's path)?
 
   Thank you!
 
   --aiphie
 
 
 
----- Original Message -----
From: "Daniel-Constantin Mierla" <miconda@gmail.com>
To: "aiphie" <chengwu8@139.com>
Cc: <users@lists.kamailio.org>
Sent: Monday, August 24, 2009 3:45 PM
Subject: Re: [Kamailio-Users] sip phone behind the nat

>
>
> On 24.08.2009 9:49 Uhr, aiphie wrote:
>> hi,all
>>    
>>    I have use sed command to clear the comment which in front of regarding nat,But it's always use local network IP to fill session description protocol->connection information->connection address,I know sip server can rewrite this message item,Can you tell me how to let sip server rewrite it?
>>    annex is my config file,please look what wrong in this?  
>>  
> have you read my previous email entirely? There was something about
> rtpproxy that may lead you to discover what is wrong.
>
> Cheers,
> Daniel
>
>>    thank you!
>>
>>    --aiphie
>>
>>
>>
>> ----- Original Message -----
>> From: "Daniel-Constantin Mierla" <miconda@gmail.com>
>> To: "aiphie" <chengwu8@139.com>
>> Cc: <users@lists.kamailio.org>
>> Sent: Friday, August 21, 2009 6:55 PM
>> Subject: Re: [Kamailio-Users] sip phone behind the nat
>>
>>
>>  
>>> Hello,
>>>
>>> On 21.08.2009 12:52 Uhr, aiphie wrote:
>>>    
>>>> Hi,body.
>>>> I'm using the kamailio as a sip server,If in the local network ,It
>>>> works very well ,But when i set the sip server in the internet, When
>>>> starting voice chat,Two sip phone will receive the behind net ip
>>>> address(sip phone's local ip address).
>>>> How i can configure sip server(kamailio) let sip server send sip
>>>> phone's peer ip address using front nat ip address(internet ip address)?
>>>> Any body can give me how to realize it?
>>>>      
>>> you need to enable nathelper module + appropriate lines in config file
>>> and install rtpptoxy.
>>>
>>> If you check the default config file you will see at the top some
>>> comments regarding nat traversal and what sed command you can use to
>>> enable it.
>>>
>>> Cheers,
>>> Daniel
>>>
>>> --
>>> Daniel-Constantin Mierla
>>> * http://www.asipto.com/
>>>    
>> >
>> ------------------------------------------------------------------------
>>
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>> Users@lists.kamailio.org
>> http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
>> http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
>
> --
> Daniel-Constantin Mierla
> * http://www.asipto.com/
>