asterisk users - Jun 2009 - Incoming Call trouble with new *Now 1.5 setup

Hi All,

I'm having a bit of trouble with my new *NOW setup.

I've downloaded and installed *NOW 1.5. We're using 1 SIP Trunk from
SimpleSignal.com. Outbound calling works great, but I'm having some trouble
with inbound calls.

 

First, we would get the "the number you have dialed is not in service"
error
on inbound calls. After some googling, I found out that I needed to enable
anonymous SIP calls in to the system. When I did that, it started to work. I
was a little worried about potential security risks so I wanted to filter
inbound calls by DID. I tried the formats DID, +DID, and +1DID, but all of
them caused the box to hang up or give me the "number not in service"
error
message.

 

Are there any known security risks by allowing anonymous SIP and having an
ANY/ANY inbound route?

 

Thanks in advance for any help!

 

--Zaheer

 

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For determining security risks, its specific to how your dialplan is set up.
If a person connects to your asterisk, what can they do? what happens? did
you set the incoming context to one with outgoing dialing rules?
Also for filtering calls, you'll probably want to either look at the
incoming sip packets or ask your ITSP for info on how the calls come in. I
have a DID with les.net and in their web interface I can choose between
having the calls addressed to sipuser at did.voip.les.net or
DID at did.voip.les.net Or maybe even check the cdr files. Or just look at the
error message when theres no catchall, it's an error like "incoming
call for
extension 523523 doesn't match anything in context whatever".

On Wed, Jun 17, 2009 at 12:20 PM, Zaheer Master <zkmlist at aisww.com>
wrote:
>  Hi All,
>
> I?m having a bit of trouble with my new *NOW setup.
>
> I?ve downloaded and installed *NOW 1.5. We?re using 1 SIP Trunk from
> SimpleSignal.com. Outbound calling works great, but I?m having some trouble
> with inbound calls.
>
>
>
> First, we would get the ?the number you have dialed is not in service?
> error on inbound calls. After some googling, I found out that I needed to
> enable anonymous SIP calls in to the system. When I did that, it started to
> work. I was a little worried about potential security risks so I wanted to
> filter inbound calls by DID. I tried the formats DID, +DID, and +1DID, but
> all of them caused the box to hang up or give me the ?number not in
service?
> error message.
>
>
>
> Are there any known security risks by allowing anonymous SIP and having an
> ANY/ANY inbound route?
>
>
>
> Thanks in advance for any help!
>
>
>
> --Zaheer
>
>
>
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