[Asterisk-Users] Sip and dual homed box

[Brancaleoni Matteo]

Hi. 
I've an asterisk box with 2 nics, one with a local
ip 192.168.1.xxx and the other with a public ip.
The default route is via the public ip route.

I need to use sip on both ends, since I have phones
on the lan and on the internet...
but.. if I set bindaddr=0.0.0.0 in sip.conf,
I had that error messages:
Jun 19 13:07:21 WARNING[7176]: File chan_sip.c, Line 386 (__sip_xmit):
sip_xmit of 0x813400c (len 475) to 192.168.1.209 returned -1: Bad file
descriptor

for every ip of my local phones. And they can't register...
and/ore make calls on both side (public & private ip)

If I set bindaddr=192.168.1.xxx all is ok, but obviously can't
register/call from outside. 
Or if the default route isn't set or is a local ip, like 192.168.1.1,
all is ok for local phones... but from outside we can't get in, of
course.

So seems that with dualhomed setup, and binding sip to all interfaces,
it works only on the interface with a default route... 

Any hint on how to get rid of that problem ?
(apart having another box that listens only on a public ip and then
connect them via IAX ;->  )

Matteo.