[asterisk-users] NAT traversal for mobile app softphones - best strategy?

[Frank]

Hi

On Fri, 2016-02-05 at 00:44 +0000, Kevin Long wrote:

> My asterisk systems sit behind a Meraki mx80 firewall at a data
> center.  I use static public IPs on the firewall and port forward
> 5060,5061, and 10,000-20,000 so the clients can connect. 


> Given this scenario, I’m hoping for advice on the best strategy 

I have the same situation and with the following sip.conf settings,
everything works fine.


[general]
externip= 12.34.56.78
localnet = 192.168.10.0/255.255.255.0
nat=force_rport,comedia
bindport=5060
bindaddr=0.0.0.0
srvlookup=no
dtmfmode=rfc2833
canreinvite=no
disallow=all
allow=alaw
allow=ulaw
tcpenable=yes


Here the configuration for a mobile device with a softphone (Android and
Zoiper)

;Mobile phone
[mobile1]
type=peer
callerid="Frank " <+987654321>
nat=force_rport,comedia
qualify=6000
host=dynamic
secret=mysupersecretpassword
canreinvite=no
context=privatephone
call-limit=2
transport=tcp