[Asterisk-Dev] Multiple IP's For sip.

[Alberto Fernandez]

Correct In sip.conf i bind the ip to 0.0.0.0 and it still doesnt let the
phones register. Im not folowing what you are trying to tell me. Please
elaborate.

On Mon, 2004-07-12 at 14:22, Tilghman Lesher wrote:
> On Monday 12 July 2004 11:17, Alberto Fernandez wrote:
> > 	When bound to more than one ip address sip doesn't work correctly, If
> > the phone is not behind Nat, I'm not a developer but somehow i figured
> > out why. I opened ethereal on the clients (X-Lite) Ethernet, since i saw
> > that the sip debug in asterisk showed that it was receiving the invite,
> > and attempting to answer to it. Now what i discovered was this. Lets say
> > the asterisk box has 2 Ethernet and that they have 2 ips. Ethernet 1 has
> > ip 1 and Ethernet 2 has ip 2 (I'm Not TOO creative :-P) If i tell a
> > phone to connect to ip 2, asterisk receives the invite and replay's
> > using Ethernet 1. Now the phone receives the answer trough IP 1. and it
> > doesn't register. Is there a way to tell asterisk to answer the requests
> > trough the ip it received them, i think this would fix this problem. I
> > saw a bug about something similar to this long time ago but no1 did
> > anything about it. Or it was for IAX, not sure.
> 
> The IP that Asterisk responds with is dependent upon the route, if you have
> the bindaddr in sip.conf set to 0.0.0.0.  Otherwise, Asterisk will use the IP
> address as set by bindaddr.
> 
> Please note that the routines currently are based upon the old 2.0 routing
> table.  We do not have code to deal with the new (default in 2.2 and later)
> complex routing tables, if you use the complex features (like routing out the
> same IP a packet came in on).  However, we're always open to contributions.
> 
> See acl.c:ast_ouraddrfor() for the route lookup code (which specifies which IP
> address we should use for sending a particular packet).