[asterisk-users] Getting No Antenna bar when behind a NAT

[edward choi]

I am using a router called IPTIME n-604. It's a famous Korean product.
I have no firewall whatsoever but that 'NAT randomize' option is something
I've never considered.
I don't even know if my router has such functionality, but I will definitely
check on it.
And I believe that my router doesn't have built-in ALG functionality.

I'll narrow down the range of network for localnet and check the 'NAT
randomize' option.
Thanks for the info.

Ed

2011/3/19 Ryan Wagoner <rswagoner at gmail.com>

> On Sat, Mar 19, 2011 at 2:10 AM, edward choi <mp2893 at gmail.com> wrote:
> > My Asterisk server is behind a NAT and I have set:
> >
> ----------------------------------------------------------------------------
> > externhost="my.server.address"
> > externrefresh=180
> > localnet=192.168.0.0/255.255.0.0
> > localnet=10.0.0.0/255.0.0.0
> > localnet=172.16.0.0/12
> > nat=yes
> >
> ---------------------------------------------------------------------------
> > in [general] section of sip.conf.
> > I can make perfect conversation with my friend with the only exception of
> > both parties being on private ip address.
> > There can be four situations when a call is established.
> > 1. A and B are not behind NATs
> > 2. A is behind a NAT, but B is not.
> > 3. A is not behind a NAT, but B is.
> > 4. A and B are both behind NATs (different NAT of course).
> > Among the four situations, 1, 2 and 3 works fine. (I guess externhost and
> > localnet did the trick)
> > But situation 4 does not work.
> > In situation 4:
> > When I call my friend, I get only one antenna bar with an exclamation
> mark.
> > (I am not talking about the iPhone's wifi bar, nor carrier's bar. I am
> > talking about Softphone's bar). But my friend has no problem with the
> > antenna bar. And both of us cannot hear anything.
> > When he calls me, now he gets one antenna bar and an exclamation mark,
> but
> > my antenna bar is just fine. And we still don't hear anything.
> > One time, there was only one time we could hear each other. He called me
> and
> > for the first 3~4 seconds, we could hear nothing. But after that we could
> > hear each other. I don't know how it worked. It was just one random
> success.
> > This is really weird. I tried Viber in the same situation and Viber works
> > just fine every time.
> > Could anyone give me any plausible explanation for this phenomenon?
> > Ed
>
> It shouldn't matter but I would only define my actual network range
> for localnet. What NAT/Firewall are you using in front of the Asterisk
> box? I have had to turn off the NAT randomize port option or turn on
> the NAT static port option. I have also sometimes had to disable the
> SIP ALG.
>
> Ryan
>
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