[asterisk-users] solution for NAT issues?

[SIP]

Does the phone have some sort of NAT Keepalive setting? Often, the only
way to keep that port open on the user's NAT gateway is to have the
NATted client send the occasional data out through the port.

N.


Ron wrote:
> i have also tried setting qualify='yes' but cpu usage spiked to 100%.
>
> Ron wrote:
>   
>> Hi All,
>>
>>
>> I been having issues on my users behind NAT, even if i hard set a 
>> specific port on the phone, there are some network that NAT's it out to 
>> a different port, in turn, some time later the phone could not be 
>> reached by the server. i think because on the server, e.g. the user is 
>> still registered on port 49923 but when the request is sent to that port 
>>   the NAT router does not forward port 49923 to port of the IP phone, 
>> maybe nat mapping has expired or something.
>>
>> I have tried STUN, still sometimes the phones just cannot be reached.
>> is there any other software to manage binding of ports on specific users 
>> so that the routers always keeps the port mapped to port of the ip phone .
>> TIA
>>
>> Regards,
>> Ron
>>
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