asterisk users - Apr 2005 - Difference Between NAT=yes and QUALIFY=yes and STUN...

I have a STUN server running on my Asterisk box which seems to work
for most of my SIP clients.. but some of them seem to require NAT=yes
turned on.   If I go further and turn QUALIFY=yes to on, is there a
reason I need to keep running a STUN server?  If so, what's the
difference?

Matt wrote:
> I have a STUN server running on my Asterisk box which seems to work
> for most of my SIP clients.. but some of them seem to require NAT=yes
> turned on.   If I go further and turn QUALIFY=yes to on, is there a
> reason I need to keep running a STUN server?  If so, what's the
> difference?
I never understood why Asterisk users seem to have such a fetish for 
STUN and SER.  Most people don't need them.  If you have many phones 
behind NAT and you want the phones to call each other and you want to 
enable reinvites then, yes, you need SER or STUN or something like that.

Asterisk seems to be commonly used in three ways:

1) Home Phone System
2) Business Phone System
3) Internet Telephony Service Provider

Generally none of these types of use has a large percentage of phones 
behind NAT and calling each other.

Companies like FWD, etc DO need this since most of their users are 
calling each other.


-- 
Always do right. This will gratify some people and astonish the rest.
Mark Twain