On 16.05.2013, at 11:55, Vassilis Radis <[email protected]> wrote:

> thanks a lot.
> 
> And my apologies to all for not THOROUGHLY RTFM...
> 

No problem! If you want to save some time configuring, and some additional 
features, you should consider using the commercial SBC base on SEMS: 
www.frafos.com. The GUI is quite comprehensive. There is also a free demo 
virtual machine.

Cheers,
Raphael.

> 
> 
> On Thu, May 16, 2013 at 12:50 PM, Max Mühlbronner <[email protected]> wrote:
>> Hi,
>> 
>> 
>> it´s very straightforward, just check sems.conf:
>> 
>> 
>> additional_interfaces=intern, extern
>> 
>> 
>> sip_ip_intern=1.1.1.1
>> sip_ip_extern=2.2.2.2
>> 
>> 
>> 
>> In your sbc profile, you can choose which interface will be used when 
>> sending the call out: 
>> 
>> outbound_interface=extern
>> 
>> 
>> 
>> Best Regards
>> 
>> Max M.
>> 
>> 
>> On 05/16/2013 11:38 AM, Vassilis Radis wrote:
>>> Sorry guys, I seem not to understand well:
>>> 
>>> How can I configure sems with both a private and a public ip? 
>>> Can I set sip_ip option multiple times and ,consequently, is there an 
>>> option in sbc app to declare which of the above ip's the B-leg calls should 
>>> be outgoing to?
>>> 
>>> 
>>> On Thu, May 16, 2013 at 12:35 PM, Emil Kroymann <[email protected]> 
>>> wrote:
>>>> Hi,
>>>> 
>>>> as Rafael pointed out, you can configure SEMS with both a private and a
>>>> public IP. So if you're concerned with the processing power required in
>>>> Kamailio, this would be the way to go. (Although I doubt that Kamailio
>>>> would be your bottleneck).
>>>> 
>>>> Regards,
>>>> Emil
>>>> 
>>>> Am Thu, 16 May 2013 12:26:14 +0300
>>>> schrieb Vassilis Radis <[email protected]>:
>>>> 
>>>> > Hi emil,
>>>> >
>>>> > Thanks for the clarification.
>>>> > Although it may be stupid I got to ask: This will double the traffic
>>>> > and processing done by kamailio , just because SEMS can't be
>>>> > configured with separate/independent UAS / UAC sockets? I dont mean
>>>> > to be provocative, I am just thinking loudly. It is an SBC. I would
>>>> > expect a totally separate "leg" in each side of the "border"...
>>>> > Anyway thanks, I guess I ll drop the private listening address and
>>>> > make it listen on the public interface.
>>>> >
>>>> > Bill.
>>>> >
>>>> >
>>>> > On Thu, May 16, 2013 at 12:04 PM, Emil Kroymann
>>>> > <[email protected]>wrote:
>>>> >
>>>> > > Re-Hi,
>>>> > >
>>>> > > Am Thu, 16 May 2013 10:58:19 +0200
>>>> > > schrieb Emil Kroymann <[email protected]>:
>>>> > >
>>>> > > > Hi,
>>>> > > >
>>>> > > > The Invalid Argument error usually results when trying to send to
>>>> > > > a non local address from a socket that is listening on 127.0.0.1.
>>>> > >
>>>> > > To expand a bit: SEMS does symmetric SIP. That is, it uses the same
>>>> > > port (and hence socket) for receiving SIP messages and for sending
>>>> > > SIP messages. I think, what you should do, is have SEMS route
>>>> > > outgoing SIP messages back to your kamailio instance which can then
>>>> > > forward them to the right destination.
>>>> > >
>>>> > > Regards,
>>>> > > Emil
>>>> > >
>>>> > > >
>>>> > > > Regards,
>>>> > > > Emil
>>>> > > >
>>>> > > > Am Wed, 15 May 2013 18:53:08 +0300
>>>> > > > schrieb Vassilis Radis <[email protected]>:
>>>> > > >
>>>> > > > > Hello , I ve setup my sems on the same box with a kamailio.
>>>> > > > >
>>>> > > > > Kamailio is bound to the public IP and SEMS to 127.0.0.1
>>>> > > > > I am only using SBC profile. In sems.conf I have
>>>> > > > >
>>>> > > > > sip_ip: 127.0.0.1:5757
>>>> > > > > media_ip: <public_ip_of_the_box>
>>>> > > > >
>>>> > > > > and next_hops and outbound_proxy are not set.
>>>> > > > >
>>>> > > > > A call comes from outside into kamailio which sends it to sems
>>>> > > > > for SBCing. Sems decides the next hop by looking into
>>>> > > > > application parameter headers that are set by kamailio.
>>>> > > > > Communication between kamailio and sems is fine. The problem is
>>>> > > > > that SEMS cannot send its initial INVITE to outside world: In
>>>> > > > > the debug messages it reports that it checks the DNS of the
>>>> > > > > next_hop, it calls send_to and then send_to function returns
>>>> > > > > "Invalid argument" which causes SEMS to report a 400 Bad
>>>> > > > > request back to Kamailio:
>>>> > > > >
>>>> > > > > May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [send_request,
>>>> > > > > trans_layer.cpp:980] DEBUG: Sending to x.x.x.x:5060 <INVITE
>>>> > > > > sip:[email protected]:...>
>>>> > > > > May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [send,
>>>> > > > > transport.cpp:109] DEBUG: send  msg
>>>> > > > > May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [send,
>>>> > > > > transport.cpp:125] ERROR: sendto: Invalid argument
>>>> > > > > May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [send_request,
>>>> > > > > trans_layer.cpp:988] ERROR: Error from transport layer
>>>> > > > > May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [sendRequest,
>>>> > > > > AmSipDialog.cpp:1135] ERROR: Could not send request:
>>>> > > > > method=INVITE; call-id=2CCEB7CF-5193AD9700045DF0-B5CFEB40;
>>>> > > > > cseq=10 May 15 18:45:27 sip2 sems[26168]: [#b5dffb40]
>>>> > > > > [onB2BEvent, AmB2BSession.cpp:1254] DEBUG: sending INVITE
>>>> > > > > failed, relaying back error reply
>>>> > > > > May 15 18:45:27 sip2 sems[26168]: [#b5dffb40] [onB2BEvent,
>>>> > > > > AmB2BSession.cpp:1259] DEBUG: relaying B2B SIP reply 400 Bad
>>>> > > > > Request
>>>> > > > >
>>>> > > > > Any ideas?
>>>> > > > >
>>>> > > > > Thanks a lot,
>>>> > > > > Bill
>>>> > > >
>>>> > > >
>>>> > > >
>>>> > >
>>>> > >
>>>> > >
>>>> > > --
>>>> > > Emil Kroymann
>>>> > > VoIP Services Engineer
>>>> > >
>>>> > > Email: [email protected]
>>>> > > Tel: +49-30-203899885
>>>> > > Mobile: +49-151-62820588
>>>> > >
>>>> > > ISACO GmbH
>>>> > > Kurfürstenstraße 79
>>>> > > 10787 Berlin
>>>> > > Germany
>>>> > >
>>>> > > Amtsgericht Charlottenburg, HRB 112464B
>>>> > > Geschäftsführer: Daniel Frommherz
>>>> > >
>>>> > >
>>>> 
>>>> 
>>>> 
>>>> --
>>>> Emil Kroymann
>>>> VoIP Services Engineer
>>>> 
>>>> Email: [email protected]
>>>> Tel: +49-30-203899885
>>>> Mobile: +49-151-62820588
>>>> 
>>>> ISACO GmbH
>>>> Kurfürstenstraße 79
>>>> 10787 Berlin
>>>> Germany
>>>> 
>>>> Amtsgericht Charlottenburg, HRB 112464B
>>>> Geschäftsführer: Daniel Frommherz
>>>> 
>>> 
>>> 
>>> 
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>> 
>> 
>> -- 
>> Max Mühlbronner
>> 
>> 42com Telecommunication GmbH
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