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[Freeswitch-users] uPnP/NAT-PMP


 
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reb-freeswitch at futu...
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PostPosted: Tue Sep 16, 2008 1:34 pm    Post subject: [Freeswitch-users] uPnP/NAT-PMP Reply with quote
I don't recall seeing anything anywhere (while compiling, on the Wiki,
etc) that would suggest that FreeSWITCH does uPnP (or NAT-PMP for that
matter; this question is without regard to NAT Traversal religion) for
port mapping. Is this a correct assumption?

Does anyone know if Asterisk does do uPnP or NAT-PMP to map incoming
ports to itself? I haven't touched Asterisk in a couple years so...

This is mostly just my idle curiosity working, triggered by another
question asked on the list...

thanks,
eric


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brian at freeswitch.org
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PostPosted: Tue Sep 16, 2008 1:41 pm    Post subject: [Freeswitch-users] uPnP/NAT-PMP Reply with quote
On Sep 16, 2008, at 1:32 PM, R. Eric Bennett wrote:

Quote:
I don't recall seeing anything anywhere (while compiling, on the Wiki,
etc) that would suggest that FreeSWITCH does uPnP (or NAT-PMP for that
matter; this question is without regard to NAT Traversal religion) for
port mapping. Is this a correct assumption?

It doesn't but with a two libs it could be made to do so. Their are
two libs to do both uPNP and PMP with little trouble.

http://miniupnp.free.fr/libnatpmp.html

That would allow you to create a module to subscribe to events to make
them map the ports back to the FreeSWITCH box. So mod_sofia could
fire an event saying "Hey, I'm on port 5060" and your mod_nat could
listen to those and poke the holes back to FreeSWITCH on those ports.
Just an idea Smile I have thought about it before.

/b



Quote:


Does anyone know if Asterisk does do uPnP or NAT-PMP to map incoming
ports to itself? I haven't touched Asterisk in a couple years so...

This is mostly just my idle curiosity working, triggered by another
question asked on the list...

thanks,
eric


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reb-freeswitch at futu...
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PostPosted: Tue Sep 16, 2008 3:08 pm    Post subject: [Freeswitch-users] uPnP/NAT-PMP Reply with quote
On Sep 16, 2008, at 2:39 PM, Brian West wrote:

Quote:

On Sep 16, 2008, at 1:32 PM, R. Eric Bennett wrote:

Quote:
I don't recall seeing anything anywhere (while compiling, on the
Wiki,
etc) that would suggest that FreeSWITCH does uPnP (or NAT-PMP for
that
matter; this question is without regard to NAT Traversal religion)
for
port mapping. Is this a correct assumption?

It doesn't but with a two libs it could be made to do so. Their are
two libs to do both uPNP and PMP with little trouble.

http://miniupnp.free.fr/libnatpmp.html

That would allow you to create a module to subscribe to events to make
them map the ports back to the FreeSWITCH box. So mod_sofia could
fire an event saying "Hey, I'm on port 5060" and your mod_nat could
listen to those and poke the holes back to FreeSWITCH on those ports.
Just an idea Smile I have thought about it before.

Cool. But note again that I don't actually want the functionality
myself, i.e. this is certainly not my lobbying for it.

I think what triggered it was the combination of the problem with hand-
configured port forwarding from a couple weeks ago combined with a
recent, albeit misdescribed, question about port forwarding. Somehow
this made me wonder whether the SoHo focus of so many Asterisk users
resulted in uPnP/NAT-PMP support being added. It was much easier to
ask here than to go find it in an Asterisk feature list... Wink

thanks,
eric



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damjan at ecntelecoms.com
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PostPosted: Wed Sep 17, 2008 12:47 am    Post subject: [Freeswitch-users] uPnP/NAT-PMP Reply with quote
Both uPnP and NAT-PMP are rather useless: they cannot handle multiple
layers of NAT (eg. NAT at home, plus NAT at ISP). ICE/STUN can.

I've heard somewhere that Asterisk 1.6 does have a MIDCOM or some similar
NAT traversal protocol. But relatively few NAT devices support these
protocols.

Why bother? NAT hole punching techniques used by ICE/STUN works through
almost all NATs, and the rest can be solved using TURN.

Bye
Damjan

Quote:
I don't recall seeing anything anywhere (while compiling, on the Wiki,
etc) that would suggest that FreeSWITCH does uPnP (or NAT-PMP for that
matter; this question is without regard to NAT Traversal religion) for
port mapping. Is this a correct assumption?

Does anyone know if Asterisk does do uPnP or NAT-PMP to map incoming
ports to itself? I haven't touched Asterisk in a couple years so...

This is mostly just my idle curiosity working, triggered by another
question asked on the list...

thanks,
eric


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