[Serusers] ser to asterisk

[Tjapko Smits]

Thanks Alan,

Ser to asterisk works now. It was quit easy indeed. 

According to your subtle remark NAT penetration is not so easy? 

I saw this in the cookbook that made me think: 

# prevents private ip space from being used
  if (search("^(Contact|m): .*@(192\.168\.|10\.|172\.16)")) {
    if (method=="REGISTER") {
      log(1, "LOG: Someone trying to register from private IP\n");
      sl_send_reply("479", "Please don't use private IP addresses" );
      break;
    };
  }

If you can filter a nated endpoint like this than i should be able to
also activate a proxy mechanism that penetrates the nated environment
like nathelper or something. Is that a correct suggestion assuming that
we are not discussing firewalls or other port blocking mechanisms.

Tjapko. 
 



On Tue, 2004-05-11 at 13:43, Alan Litster wrote:
> Hi Tjapko,
> 
> The second point is quite easy.
> 
> if (uri=~"^sip:00) {			# Match on two leading zero's
> 	rewritehost("asterisk.com");	# Change the destination host
> 	forward(uri:host, uri:port);	# Forward the call
> 	break;
> };
> 
> See also http://www.mit.edu/afs/athena/project/sip/sip.edu/ser.shtml
> 
> Regards,
> 
> Alan
> 
> -----Original Message-----
> From: serusers-bounces at iptel.org [mailto:serusers-bounces at lists.iptel.org]On
> Behalf Of Tjapko ITS Consult at ncy
> Sent: 11 May 2004 12:36
> To: serusers at lists.iptel.org
> Subject: [Serusers] ser to asterisk
> 
> 
> Hello list,
> 
> I am new at ser :-) and have 2 questions and wonder if somebody can hint me
> in the correct direction.
> 
> Some of my endpoints are behind nat. I understood that I can activate
> nathelper (or mangler??) to overcome this problem. What I don't understand
> is how i can activate (write the lines) this mecahnism for just the nated
> endpoints. All my endpoints are similar 1 port and 4 port gateways.
> 
> Secondly I wonder if there are any more advanced ser.cfg examples at hand
> that describe the way of forwarding calls beginning with for example 00 to
> an asterisk box and examples of routing traffic to PSTN gateways would be
> more than welcome for me to study. Any example will do. Or can somebody hint
> me where to find this. The scripts that i have found sofar do not reveal
> what i like to establish.
> 
> Kindest Regards,
> 
> Tjapko Smits
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