[VoiceOps] Broadsoft SIP Trunks and ILD Fraud

[Mark Holloway]

Some items to check:

1) Do you have the voice portal enabled?  If yes, are you allowing users to dial into the voice portal and enable call forwarding to a PSTN number?
2) Do you provide open access to the web portal?  How is your username/password strength?  Once a user account is hacked through the web portal call forwarding is typically enabled for fraud purposes.
3) If you have the voice portal enabled, are you allowing users to obtain outside dial tone to place calls from the voice portal?

A best-practice I always observed was to modify the outgoing dial plan for every Group or Enterprise and disable international call forwarding/transfers. It is very rare customers in the U.S. require this and you are better off disabling by default but having your Sales team ask up front when gathering customer requirements if they really need this enabled. 



On Dec 30, 2011, at 10:44 AM, Zak Rupas wrote:

> Mark
>  
> All of SIP trunk customer have to Registers on the network. It’s a requirement we adopted some time ago. I also just checked and Bursting is disabled on my latest account that had the issue. The had 5 SIP trunks but were averaging 20 CC ILD calls. So we may have encountered a Broadsoft bug. I am working on trying to come up with a plan for testing?
>  
> Zak Rupas
> VoIP Engineer
> 
> SimpleSignal
> 3600 S Yosemite Suite 150
> Denver, CO 80237
> One Number Rings All My Phones: 303-242-8606
> <image001.png>
> SimpleSignal.com | Blog | Facebook | Twitter
>  
> From: Mark Holloway [mailto:mh at markholloway.com] 
> Sent: Friday, December 30, 2011 10:38 AM
> To: Zak Rupas
> Cc: voiceops at voiceops.org
> Subject: Re: [VoiceOps] Broadsoft SIP Trunks and ILD Fraud
>  
> The IP PBX (or on-prem SBC) should be registering to Broadworks using the Pilot number.  The SBC in your core will only allow SIP Invites from the registered device.  If you have non-registered SIP Trunks in Broadworks this is very dangerous. 
>  
>  
> On Dec 30, 2011, at 9:36 AM, Zak Rupas wrote:
> 
> 
> Good Morning Voice OPS
>  
> Is anyone else experiencing anything like this? If so please share what you have done / or will to make it stop
>  
> We have a series of smaller SIP trunk customers using Broadsoft trunk groups. By design the trunk groups have a concurrent call limitation based off the customer’s order. These smaller SIP trunks groups when compromised are able to run up HUGE fraud bills even tho they only have 5 or 6 SIP trunks. Needing to know if anyone else is seeing this that has Broadsoft and what was done to protect yourselves?
>  
> Otherwise Happy NYE J
>  
> Zak Rupas
> VoIP Engineer
> 
> SimpleSignal
> 3600 S Yosemite Suite 150
> Denver, CO 80237
> One Number Rings All My Phones: 303-242-8606
> <image001.png>
> SimpleSignal.com | Blog | Facebook | Twitter
>  
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>  

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