[OpenSIPS-Users] Problem with Un-authenticated calls coming from a Asterisk gateway : need to restrict access

[Roberto Ovani]

I'm using opensips 1.6.1, on Ubuntu 9.10 server (192.168.1.12)
I configured an asterisk box (192.168.1.19) to for PSTN.

I'm trying to restrict access, to prevent false authentication from 
unauthorized users except the gateway I set up.

from the terminal, i wrote :
/osipsconsole
address add 0 192.168.1.19 255.255.255.0 UDP 5060
/to add the gateway data into the db
So, i want ONLY that asterisk box to send calls to opensips bypassing 
authentication (this is what I found on the book by Gonçalves, about 
opensips 1.6, nd it says I can do it).

But if itry with another asterisk box, on another Ip address e.g. 
192.168.1.20 , opensips makes the call pass, even if I didn't put this 
entry in my Db.... I want to restrict access to UN-authenticated calls 
ONLY to 192.168.1.19

this is a piece of code I found on the book and I used to restric the 
access only to 192.168.1.19:

  if (!(method=="REGISTER") && is_from_local())
         {

                 if (!check_source_address("0"))
                 {
                         if (!proxy_authorize("", "subscriber"))
                         {
                                 proxy_challenge("", "0");
                                 exit;
                         }
                 }
                 else if (!db_check_from())
                 {
                                        sl_send_reply("403","Forbidden 
auth ID");
                                         exit;
                 }

         }


Is it right?
What do you think I have to check ?
Could you please help me ? I can't solve this problem....but i need it !
Thanks in advance
Best regards
Roberto
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