[Asterisk-Users] Asterisk network architecture

[Cedric Fontaine]

Hello,

I'm currently working on a new installation and wondering which 
architecture and protocol I should use...

I want to share my Asterisk server between users on my internal LAN and 
a user connecting via Internet...

So, my server has to be reachable from outside and also from inside... 
For the external user, I'll use a softphone and probably IAX2 ? What 
about internal users and IP phone ? We have grandstream budgetone and I 
don't know which protocol I should use.

I'd like to find a way to have my asterisk server in a DMZ protected 
from outside and not directly on the internal network. Is there any 
recommended architecture ?

Also, is the traffic between external user to asterisk server encrypted 
? and is there any softphone with rsa keys auth ?

Thanks