Hi Lonnie,

Thank you for your quick reply.

In my sip.conf I have:

externip=primary_isp_ip
;external=secondary_isp_ip

And I edit sip.conf to change which line is commented out if/when the primary fails. A bit ugly and I'd like to get away from it if possible.

I tried adding a "canreinvite=no" to both the [general] and the ATA specific contexts in sip.conf. It works for v1.2 but that was working anyway. For v1.4 it does not seem to do any good. I think that no invite was made to the ATA prior to establishing the connection with the ENUM destination. In this case Asterisk v1.4 seems to be acting more like a SIP proxy here than a B2BUA. I haven't yet tried putting an ANSWER in the dial macro ENUM to force an invite to the ATA before setting up with the final ENUM destination, that might make the "canreinvite=no" work. It might also create a problem if the ENUM fails and I want to then continue on with a try to the ITSP.

--Tod



On Nov 24, 2008, at 3:33 PM, Lonnie Abelbeck wrote:

Tod,

Just a couple of thoughts...

1) If your astLinux box is behind NAT, then your sip.conf variable

externip=<your_public_ip>

must match your public WAN address.  With a dual-WAN router I'm not
sure how you are handling this.

2) If your ATA's sip.conf context contains:

canreinvite=no

should guarantee the RTP voice path will go through your astLinux box.

Lonnie


On Nov 24, 2008, at 5:05 PM, Tod Fitch wrote:

Situation: Have two ISP links each with a static IP. Current router
does not understand SIP, so ports 5060 and 10000-20000 are forwarded
to Asterisk. On my v1.2 system Asterisk always acts as a B2BUA and
everything is fine.

Moved to AstLinux v0.6.1 with Asterisk v1.4 running on a Soekris
Net5501 and while calls to/from registered ITSP work, calls to ENUM
destinations fail as the Asterisk attempts to route RTP from the
phone to the ENUM destination. At least my firewall status page show
the ATA sending RTP packets to the ENUM destination so I think this
is what is happening. (I have been trying to figure out how to keep
Asterisk in the path but the NAT and reinvite settings for outbound
appear to have no effect in this case).

So. Looked at changing router to an embedded box running pfSense,
but apparently the embedded version of pfSense does not support
packages and it would require the siproxd package to be any better
than my current machine.

Next option: Enable the Arno firewall in AstLinux and put on the
phones into their own network that has to go through the AstLinux
box. That should keep the dual-Wan router happy. It looks like this
should work (EXT_IF set to current LAN, INT_IF set to new VoIP
specific network, set FULL_ACCESS_HOSTS to allow management from the
LAN, and some revised cabling and new Ethernet switches). This will
be my fall back position.

(Sorry for the long winded introduction...)

However it would be cleaner if I replaced the current firewall/
router with the AstLinux box. Has anyone done this with multiple WAN
interfaces? What issues did you run into? Was the Arno firewall
multiroute plug-in sufficient? Do you need to use the sip-voip plug-
in?

--Tod

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