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 <[email protected]> > On Sat, Mar 19, 2011 at 2:10 AM, edward choi <[email protected]> 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 > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? Join us for a live introductory webinar every Thurs: > http://www.asterisk.org/hello > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >
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