[OpenSIPS-Devel] PUA_BLA fails for UA's registered behind NAT

[Anca Vamanu]

Hi Inaki,

Thanks for your report. Indeed this issue was overlooked. I will use the 
received uri as outbound proxy if no outbound_proxy is set in the script.

regards,
Anca

Iñaki Baz Castillo wrote:
> Note: I've detected this problem with Kamailio 1.4 but since the module is 
> done by Anca and I haven't seen a fix I report it also here. Please tell me 
> if I shouldn't do it.
>
>
> I'm trying PUA_BLA with phones behind NAT. When the REGISTER arrives I 
> do "fix_nated_register()" so the original Contact:
>   Contact: <sip:user at 192.168.1.100:5060>
> becomes:
>   Contact: <sip:user at 192.168.1.100:5060;received=80.80.12.54:34567>
>  
>  
> After that I do "bla_set_flag()" so PUA_BLA generates a SUBSCRIBE that should 
> arrive to the UA, but PUA_BLA generates it:
>  
>   SUBSCRIBE sip:user at 192.168.1.100:5060
>  
> So this SUBSCRIBE will never arrive to the UAC since it's a private IP. The 
> SUBSCRIBE should be sent to the "received" parameter (added before) but I 
> don't know how to achieve it.
>  
> A dirty workaround is doing "fix_natted_contact()" before "bla_set_flag()" but 
> this is a bad idea since it will change the stored Contact URI in "location" 
> table (and normally UA's need to see their same Contact header used for 
> registration in the RURI of requests sent from the proxy).
>
> Any idea of how to solve it? Thanks a lot.
>
>
>