IPS to protect against VOIP Attacks

[juan babi <juan_babi () hotmail com>]

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Hi all,

 

Im doing some VOIP security consulting for one of my
clients.

I was wondering which is the best (or at least-good) IPS
against VOIP attacks coming from the internet to the client network. he has an Asterisk
n the DMZ and cisco call manager in the lan. I want to protect the voip
components with an IPS against known attacks and DOS-DDOS attacks as well.

 

which one is the best?

 

thanks a lot,

 

juan

                                          
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