Hi Stuart, Le 08/04/2014 10:41, Stuart Henderson a écrit : > On 2014-04-07, Christophe <t...@stuxnet.org> wrote: >> The goal is to accept every SIP device from inside the LAN to register >> to SIP provider without any "outbound proxy" configuration, and let >> siproxd acting as a masquerading server. > > Do you really need it? Most user-facing SIP providers run SBCs to work > around NAT problems (amongst other things) and either don't need, or > work better without, SIP NAT helpers. >
As you say : most , but not all ... and we have to deal with :( . Cisco routers (2600 and 800 series) are able to handle this : only public IP address are seen in SIP packets on external network interface, without configuring anything in "internal SIP devices" (IPBX or phones). That's why I try to get a similar behavior using a transparent SIP proxy. Don't know if it's the best way to do, but from what I know of SIP protocol and NAT issues, I found it was a nice solution to handle all cases with minimum configuration (or reconfiguration) ;). Christophe.
