Re: [Linphone-developers] How to deal with the Symmetric NA T for linphone？

[Rick van Rein]

Hello,

> Could linphone penetrate/traverse the Symmetric NAT？

No, this is generally impossible for SIP/RTP without external
help.

> The ICE of linphone didn't use TURN.

TURN is one way of getting external help, indeed.  It's also
yet another step to endure the pains of IPv4 and NAT.

I am taking another angle, curious if you like it:
 - switch to IPv6
 - be sure to have IPv6 working everywhere
 - enter 6bed4, http://devel.0cpm.org/6bed4

Note well -- the demo client is alpha, and may or may not work for you.
Extensions to the tunnel may follow in the future.  But if you built it
into Linphone as a fallback you would not have to worry about NAT.

Anyone who is behind symmetric NAT must do something to overcome it;
one way is using an external helper like MediaProxy or TURN, another
would be to be available over IPv6.

I am porting 6bed4 to Android *now*, using the VPN interface.

Responses welcomed :)


Cheers,
 -Rick