[Asterisk-bsd] Securing Asterisk with a DID

[Frank Griffith]

Thanks. I'm still a novice at hardening my asterisk system. I never had any 
trouble until recently. I think someone found my DID number and that's what the 
source of the hack is, not actually through my asterisk server. But the VOIP 
provider is convinced that's how it happened. But wouldn't the 
/var/log/asterisk/cdr-cvs/Master.csv file show which extension they used. And 
I'm not seeing any of the illegal calls being logged with an extension in my 
asterisk sip.conf file. They are logged with an IP address...which again I don't 
know how to interpret other than running a whois and seeing that alot of them 
originate from Amsterdam.



________________________________
From: Tim St. Pierre <tim at communicatefreely.net>
To: Asterisk on BSD discussion <asterisk-bsd at lists.digium.com>
Sent: Sun, August 29, 2010 9:07:07 PM
Subject: Re: [Asterisk-bsd] Securing Asterisk with a DID

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You mean, you didn't before?

I wouldn't really call them a terrorist if there was nothing stopping them from 
dialing through your
system.  Oppertunist, unscrupulous perhaps.  Terrorists generally try to cause 
mass destruction or
panic in a large group of people.

At any rate, it isn't hard.

You could use vm_authenticate, which will authenticate based on the voice mail 
password, or just
plain authenticate.

You should also do some pattern matching on the numbers that are input, before 
the call is sent back
out.  Do you really need to call anywhere in the world, or just certain places?  
You could restrict
the destinations, which might save you if someone figures your password out.

- -Tim

Frank Griffith wrote:
> I have a DID with a VOIP provider which has worked pretty well. Until
> some terrorist of some one of similar liking discovered it and used up
> all my credits calling Israel, Morroco and Cuba. I would like to find
> out how to be able to setup this DID so that only I could call into it
> and access my service for making outside calls. I could disable this all
> together but then that defeats my reason for needing the DID in the
> first place. Is there a way to perhaps password protect this, that is
> when I call in I have to enter a password before being allowed to dial out?
> 
> 

- --
Tim St. Pierre
IP Voice technician
Communicate Freely
1-877-291-8647 x5101
sip:5101 at communicatefreely.net
tim at communicatefreely.net
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