[Freeswitch-users] How to get the network address of registered Endpoint (NAT Problem)

[Mitja]

Hello Francis,

thank you for your time and your fast answer. Actually the communication 
with natted devices is possible in the current setup. Its just a 
shortcoming of that type of phone.

To clarify: Im looking for a way to possibly work around those 
shortcomings server side. I could find a way to do just that by using 
the the IP of the natting device in my bridge command. Now I want to 
create an automatic workaround for those edge cases. What I need is a 
way to get the information from which IP the device is registered (as 
you can see when calling the API command sofia status profile <profile> 
reg).

Thanks again
Mitja

Am 07.01.2014 12:06, schrieb Francis:
> 1. Have you turned on STUN on the phone?
> 2. Does the phone support any kind of NAT keepalive, say 20 seconds or 
> so?
> 3. Does the phone support RPORT?
> 4. Is there a firewall on the freeswitch server, and if so, are the 
> appropriate SIP and RTP ports open to new traffic?
> 5. Does the router have SIP ALG disabled? (yes is a good answer :)
>
> One more question- is the freeswitch server behind a nat as well, or 
> does it have it's own public IP address?
>
>
> On 7/01/2014 6:38 PM, Mitja wrote:
>> Hello there,
>>
>> Im trying to solve NAT related Problem which is caused by missbehaving
>> SIP phone.
>> Up Front: I searched the wiki and the web for all the NAT related
>> sites/mailling list. I think its a error of the invoxia IPhone docking
>> station (the missbehaving SIP phone), thus I did not open a jira for it.
>>
>> We have a freeswitch server with internet accessibility and a Phone
>> behind a natting router (Fritz!Box).
>> FreeSWITCH (1.2.3.4) <-> (10.11.12.13) NAT (192.168.0.1) <->
>> (192.168.0.2) SIP Phone
>>
>> The Phone is able to register and initiate calls. But when someone else
>> to call that endpoint, its unreachable.
>>
>> I did some research and the problem seems to be that the phone registers
>> with a Contact containing the private IP Adress (192.168.0.2).
>>
>> freeswitch at 1.2.3.4@internal> sofia status profile internal reg
>>
>> Registrations:
>> ================================================================================================= 
>>
>>
>> Call-ID:        aeac7f28-a6a0-4ba1-9d7c-30934924726d
>> User:           270 at 1.2.3.4
>> Contact:        "user" <sip:270 at 192.168.0.2:52767;ob>
>> Agent:          invoxia-lemonvoice-v6.17.4
>> Status:         Registered(UDP)(unknown) EXP(2014-01-06 13:06:35)
>> EXPSECS(134)
>> Host:           ippbx-border
>> IP:             10.11.12.13
>> Port:           52767
>> Auth-User:      270
>> Auth-Realm:     1.2.3.4
>> MWI-Account:    270 at 1.2.3.4
>>
>> Other devices in the same Setup have their NAT IP [+Port]
>> (10.11.12.13:52767) in their Contact Header which then works fine. In
>> this setup however the FreeSWITCH tries to send the INVITE Message to
>> 192.168.0.2 and even when a NAT Table on the firewall manages to map it
>> to 10.11.12.13:52767 the answer from 10.11.12.13 is discarded.
>>
>> Normally I use bridge with user/270 at 1.2.3.4 with the dialstring
>> "{presence_id=${dialed_user}@${dialed_domain}}${sofia_contact(internal/${dialed_user}@${dialed_domain})}". 
>>
>> I tried to force freeswitch to use the NAT IP address by calling bridge
>> with "sofia/internal/sip:270 at 10.11.12.13:52767;ob" which worked fine.
>> The IP address is of course not static but if I would be able to extract
>> the IP information which is stored in sofia registry (see above) I could
>> arrange my dialplan in a way that would fix that phones missbehaviour.
>>
>> So after all that describing text (sorry for that), heres my question:
>> Is there a way (an API or Dialplan command) to get the IP Information
>> which is stored the sofia registry.
>>
>> Thanks in advance
>>
>> Regards,
>> Mitja
>>
>>
>>
>>
>> _________________________________________________________________________ 
>>
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>> http://www.freeswitchsolutions.com
>>
>> 
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