[OpenSER-Users] check_from() and calls from a PBX

[Klaus Darilion]

You could use other headers for signaling from Asterisk to openser, e.g. 
PAI:

in asterisk: show application SIPAddHeader

in openser: read PAI header and eventually use uac module.

klaus

Iñaki Baz Castillo schrieb:
> Hi, I've a PBX (Asterisk) registered in OpenSer as user "pbx at domain".
> When Asterisk receives a call from PSTN it calls to OpenSer users with From:
>   From: <sip:PSTN_number at domain>
> 
> But of course, this can't validate "check_from()" since From username 
> (PSTN_number) and auth username (pbx) are differents.
> 
> As I solution I don't do "check_from()" if From username is "pbx" but of 
> course, it can create security problems.
> 
> Other solution is to force "From" username in PBX outgoing calls, but with 
> this the callerid number will be "PBX" (that is not very cool for end users 
> xD).
> 
> Another solution is using "trusted" ips, but this is not valid for me since 
> Asterisk is behind a NAT and dynamic IP, and because there can be multiples 
> PBX for each domain of OpenSer and I don't want they to have privileges.
> 
> 
> Is there any other approach for this?
> 
> Thanks for any suggestion.
> 
>