I recently started looking at breaking out via SIP to my SP for my voice calls.
The first question that popped up is how would I secure my internal network from my SP network.
Since they supply me with and IP and if their network got compromised or some not so friendly staff would be able to connect to my network.
Sure one can setup some ACL's and so forth but I want to know what is best practice.
I did some reading spoke to some guys and they say a session border controller is the way to go.
Found some documents regarding how to set it up but nothing that explains the security aspects.
I must say I am not a expert in the field.
Could I ask if someone has done this setup before to please guide me as to what needs to be done.
Any help is much appreciated