"Kevin P. Fleming" <[email protected]> writes: > I must be missing something. If a phone sends a UDP packet to > 192.168.1.1, how does that get routed to (arrive at) the 10.0.2.1 > interface on the Asterisk server?
The easiest way is that the Asterisk server itself is the router. Phones on 10.0.2.0/24 have 10.0.2.1 as default gateway. Another option is that there are no real routers; the phones are disconnected from the Internet, they still have 10.0.2.1 as default gateway but they only use it to reach the Asterisk server. > The only way I can imagine that happening is if a router in between > the phone and the server has been told that 192.168.1.0/24 is > reachable *through* 10.0.2.1, which seems like a bizarre way to > construct a network. I do not feel that the two scenarios above are particularly bizarre. > Getting replies from Asterisk *back* to the phone would also require > the IP stack on the Asterisk server to route those replies back over > the 10.0.2.0/24 interface instead of the 192.168.1.0/24, which doesn't > make any sense either. If the phone is on 10.0.2.0/24, the IP stack will route packets to it directly through the 10.0.2.1-interface by default. It actually takes quite serious contortions to make it send the packets elsewhere. Servers with multiple interfaces are a bit out of the ordinary. Right now Asterisk is difficult to work with on such servers, which is not a large problem for Asterisk in general, because they are so rare. You can always work around the problem either by creative routing or by explicitly binding to one address. > chan_sip does have the ability to use connect()-ed sockets for dialogs > now, since that is required for TCP, TLS and WebSocket support. It > wouldn't be a huge leap to use them for UDP as well, if that was > beneficial. It would be greatly appreciated :) It is low priority for the Asterisk project, as there are always workarounds. Extra points for making Asterisk support IP addresses appearing and disappearing... That would make VRRP/HSRP failover work. (It "works" if you bind to 0.0.0.0, but it is difficult to get Asterisk to use the VRRP-address as the source address for outgoing packets). /Benny -- _____________________________________________________________________ -- 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
