[Asterisk-Users] Asterisk behind LinkSys NAT Routing

[John Todd]

>I'm replying to my own post because it is not clear.
>
>1) STUN can find all the firewalls between Aterisk
>and whatever else.  It can also find what your public
>IP address it.

Correct.

>2) THere is an easy to use opensource STUN library
>available but I'm not yet sure how acivly developed it is
>currently.  It's e-mail list seems very inactive.

My perception of the STUN code is that it's fairly simple to 
understand, and that it "just works," therefore there are few 
questions on a mature package that needs no additional features at 
this time.  I could be wrong...

>3) Suggestions please:  Where is Asterisk should STUN
>code go?  I figure  not in any of the chan_*.c routines
>as NAT environment is global to all channels.  You can't
>just do it once at startup either as the environment may
>be dynamic

I don't see why it wouldn't go into the respective channel 
configuration files, and into the applications that ran against those 
files.  Perhaps reference some shared library, but I suspect that the 
configurations should be in each file independently, so each channel 
type can carry it's own data structures for internal/external IP 
address data (which you may want to be different on a 
channel-by-channel or even host-by-host basis.)

JT


>
>--- Chris Albertson <chrisalbertson90278 at yahoo.com> wrote:
>
>>
>>  Hasn't anyone simply _looked_ at the code?  This sounds like the
>>  patch that was posted here to this mailing list last week.
>>  Did it make it into CVS already?
>>
>>  Yes, "STUN" is the way to go.  It can find out what your external
>>  IP address is and what kind of firewall you have.
>>
>>  I'm currently trying to learn more about STUN and how it could be
>>  added
>>  into Astrisk.  You certaily can't have Asterisk block and wait
>>  for a STUN server so I think STUN goes in a new thread.  Who
>>  to do that?  There seem to be enough examples already in Asterisk
>>  I'm reading these.  The other problem is trying to contact the
>>  maintainer of the STUN library.  So far my own post asking "Who
>>  maintains this?" is the only message  I've seen on their list.
>>  Perhaps the answer is "no one"?
>
>
>=====
>Chris Albertson
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