[asterisk-users] SIP Trunk over Proxy (matching ip of outbound proxy in incomming calls)

[Kseniya Blashchuk]

Not sure maybe there's a better solution but I thought about using another
peer with type=user for incoming connections.

On Mon, May 22, 2017, 6:13 PM Benoit Panizzon <benoit.panizzon at imp.ch>
wrote:

> Hello List
>
> I work at an SIP Provider and we have added and SBC in front of our
> Voice Switch to protect it.
>
> This requires all our SIP Trunk customers to register via a 'proxy'.
>
> I struggle with Asterisk to work over a proxy.
>
> This is what I have done so far.
>
> register => username at sip.example.com:password at sbc.example.com
>
> This works fine, asterisk is sending registrations via the SBC to the
> voice switch defined by URI.
>
> [username]
> type=peer
> secret=password
> host=sip.example.com
> outboundproxy=sbc.example.com
> context=from-ISP-X
>
> From the Dialplan that string is dialed:
>
> Dial(SIP/username/${EXTEN})
>
> This works fine, asterisk sends the call to the outboundproxy defined
> in the sip.conf section of [username].
>
> Before adding outboundproxy setting, incomming calls were
> matched because they originated from the host and passed to the correct
> context.
>
> I have set allowguest=no to challenge all those sip attackers in
> [default] who occasionaly managed to call internal extensions defined
> there.
>
> Now incomming calls do not originate from the ip of sip.example.com
> anymore, but from the ip of sbc.example.com and are not set to the
> context [from-ISP-X] but probably to [default] and challenged.
>
> Of course, I could allow guests, but that would bring back the problem
> of having unwanted calls from sip scanners.
>
> So how do I tell the asterisk to also match calls from the ip of the
> outbound proxy?
>
> -Benoît Panizzon-
> --
> I m p r o W a r e   A G    -    Leiter Commerce Kunden
> ______________________________________________________
>
> Zurlindenstrasse 29             Tel  +41 61 826 93 00
> CH-4133 Pratteln                Fax  +41 61 826 93 01
> Schweiz                         Web  http://www.imp.ch
> ______________________________________________________
>
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> Check out the new Asterisk community forum at:
> https://community.asterisk.org/
>
> New to Asterisk? Start here:
>       https://wiki.asterisk.org/wiki/display/AST/Getting+Started
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20170522/8338bfc1/attachment.html>