[App_rpt-users] Incoming connects

[Andrew Sylthe]

Hello Doug,

I found the following article detailing NAT table issues with that specific
router:  http://www.dslreports.com/faq/16233

It appears that one possible work around is to upgrade the firmware to
increase the size of the NAT table.  You may want to check if there is a
firmware upgrade available for your friend's router.

It sounds like you could be experiencing a potential NAT timeout issue.  I
believe IAX has a 60 second refresh set by default.  The router could
possibly be expiring the NAT translation if the NAT timeout on the router
is set to something less than 60 seconds.  In which case you'd have to
recompile iax2.h with '#define IAX_DEFAULT_REG_EXPIRE 60' set to something
like '#define IAX_DEFAULT_REG_EXPIRE 29', or change the NAT timeout setting
in the router.

You could easily do a 'tcpdump port 4569' on your friends system from the
command prompt (logged in as root) to see if traffic is reaching his system
on port 4569.

I hope this helps.

Thanks!


On Fri, Jan 10, 2014 at 9:41 PM, Doug Crompton <doug at crompton.com> wrote:

> I am remotely trying to troubleshoot a friends new Allstar installation.
> I can ssh in and connect out to nodes but I cannot connect in to the system
> from external nodes. Port 4569 is forwarded.
>
> I discovered this link -
>
> http://www.voip-info.org/wiki/view/IAX
>
> about consistent NAT and I was wondering if that might be the problem.
>
> I was able to connect in one time right after a reboot which might support
> the NAT issue.
>
> The router is an Actiontek MI424WR GigE  as supplied by Verizon on their
> FIOS system.
>
> Is anyone else having a problem with this router or have any ideas on
> this?
>
> Nothing is logged at the server or shows up in the client on the system
> which kind of points to a routing failure.
>
> Is there a good way to check for open port 4569 as I don't think normal
> port scan programs will check this.
>
>
>
> *73 DougWA3DSPhttp://www.crompton.com/hamradio
> <http://www.crompton.com/hamradio>*
>
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>
>


-- 
Andrew Sylthe
KC9ONA
Cell:  224.623.3853
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