Need a simple Proxy to avoid opening asterisk to annon calls

Asterisk Asterisk General
1

I want to allow inbound calls to an intermediary (proxy) server , then after certain criteria is met , simply redirect the call.

I want the extensions on an asterisk to have publicly available SIP URLs like

1234@mydomain.com

1234@mydomain.com would then pass to the asterisk server whether on 1234@mydomain.com:5061 or 1234@differentdomain.com

In the way mydomain.com need not be open to receive call from any IP (annon calls) only differentdomain.com would be open.

I need this to work with most any number sent , for instance ${EXTEN}@mydomain.com will always pass to ${EXTEN}@differentdomain.com , with some rules applied.

aside from running another instance of asterisk (which I am not sure how that would happen on the same machine) , this seems like a relatively simple thing but not sure where to go with it.

Any ideas?

Thanks Mark

2

What advantage does this have over filtering them on the main server?

Running two instances is easy. You specify a different asterisk.conf in the initial command line, and go from there. However, if you want to do this in a separate process, a SIP proxy may well be better.

Note that you can’t change the caller ID on a redirect. You can only do so if you relay the call. Maybe that is what you meant.

3

Yes I know that a SIP proxy will do it any specific suggestions? Anything lightweight? . Not interested in a redirect I need a proxied call.

4

Use OpenSips or Kamalio for that. They have tutorials to do it.