[OpenSIPS-Users] Request forwarding and topology hiding with b2b_init_request

[Bogdan-Andrei Iancu]

Hi,

Two notes:

1) you cannot user b2b and forward function in the same time ; b2b is 
doing its own "forwarding"....

2) if you do forward, you should take care about Record-Routing and 
Loose-Routing mechanisms (simply doing forward for all requests - 
initial or sequential - does not do the job) - check the "SIP Routing" 
webinar:
     http://www.opensips.org/Documentation/Webinars#toc12
Also, check the mhomed param:
http://www.opensips.org/Documentation/Script-CoreParameters-1-11#toc69

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

On 28.08.2014 08:15, Eugene Prokopiev wrote:
> Hi,
>
> My network scheme looks like:
>
> 10.10.2.2 ---> (10.10.2.1|10.10.1.1) ---> 10.10.1.2
>
> I have two separate networks (10.10.1.0/24 and 10.10.2.0/24) without
> routing between them. I have opensips-1.11.2 installed and with
> interfaces in each network. I need to forward all requests from
> 10.10.2.2 to 10.10.1.2 and foward responses back.
>
> My initial config was:
>
> mhomed=yes
> auto_aliases=no
> disable_tcp=yes
>
> mpath="/usr/lib64/opensips/modules/"
>
> loadmodule "mi_fifo.so"
> loadmodule "sl.so"
>
> modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")
>
> route {
>    forward("10.10.1.2:5060");
> }
>
> All requests was forwarded fine, but I see unchanged ip address from
> network 10.10.2.0/24 in all requests headers forwarded to 10.10.1.2. I
> need to see ip address only from network 10.10.1.0/24 in this
> requests.
>
> So, I tried to use b2b_init_request:
>
> mhomed=yes
> auto_aliases=no
> disable_tcp=yes
>
> mpath="/usr/lib64/opensips/modules/"
>
> loadmodule "mi_fifo.so"
> loadmodule "sl.so"
> loadmodule "tm.so"
> loadmodule "b2b_entities.so"
> loadmodule "b2b_logic.so"
>
> modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")
>
> modparam("b2b_logic", "db_mode", 0)
> modparam("b2b_entities", "db_mode", 0)
>
> route {
>    b2b_init_request("top hiding");
>    forward("10.10.1.2:5060");
> }
>
> There are no significant improvements with this configuration. I see
> my original INVITE and many additional INVITE requests with UserAgent
> : OpenSIPS, forwarded to 10.10.1.2, but headers contains ip addresses
> from network 10.10.2.0/24.
>
> What is wrong in my configuration? How to make the real topology hiding?
>