[asterisk-users] sip.conf outboundproxy

[John Todd]

On Mar 26, 2009, at 6:07 AM, Kevin P. Fleming wrote:

> Ricardo Carvalho wrote:
>
>> Does it only send OUTBOUND calls via the proxy and not also internal
>> extension calls via that proxy?
>
> As has already been posted in your other threads about this subject,
> Asterisk has no concept of an 'outbound' call at all. In that sense,  
> the
> name of this option in sip.conf is incorrect, it should just be  
> 'proxy'.
>
> If you tell Asterisk to use a SIP proxy for sending out SIP  
> requests, it
> will send all requests to that proxy, regardless of whether that  
> request
> might be involved in a call that you classify as 'internal'. To
> Asterisk, a SIP call is a SIP call; there is no 'internal',  
> 'external',
> 'outbound', 'inbound', at least not in the sense of 'inside my PBX' or
> 'outside my PBX'.


I agree.

But... (isn't there always a caveat?)

Would it be so difficult to have perhaps two different proxies?  One  
would be for any SIP messages destined for IP addresses that were not  
in any of the "localnet=" lines, and one would be for any SIP messages  
destined for IP addresses that were destined for IP addresses that  
were NOT in the "localnet=" lines.  Of course, leaving them blank  
would mean that a proxy would not be used for one group or the  
other.   This would allow creation of the concept of "outside" and  
"inside" at an administrative level using previously-described network  
definitions in sip.conf.  Plus, it would dis-entangle a lot of the  
logic that one might otherwise have to install on the proxy to reflect  
certain messages back into NATted zones or otherwise complex internal  
structures.

I have imagined several more complex situations where I'd want to have  
multiple proxies, each with their own network ACL trigger masks, but  
I'll stick with the simple case for now.  :-)

JT

---
John Todd                       email:jtodd at digium.com
Digium, Inc. | Asterisk Open Source Community Director
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