Ti ringrazio in effetti sembrava tutto a posto.
Ho aperto un numero Voip free con Messagenet giusto per provare: configurato correttamente con le porte come indicato. Succede che chiamando il numero Messagenet la chiamata cade ed ho il seguente log (credo sia una impostazione dl firewall, ma non ne sono certo):
19:27:03.578 Call::Terminate [CM503008]: Call(28): Call is terminated
19:27:03.546 LineCfg::getInboundTarget [CM503011]: Inbound out-of-office hours' rule for LN:10000 forwards to DN:
19:27:03.546 LineCfg::getInboundTarget [CM503011]: Inbound out-of-office hours' rule for LN:10000 forwards to DN:
19:27:03.531 Call::RouteFailed [CM503014]: Call(28): Attempt to reach [sip:www.dominio.it:5061] failed. Reason: Not Found
19:27:03.531 CallCtrl:

nSelectRouteReq [CM503013]: Call(28): No known route to target: [sip:www.dominio.it:5061]
19:27:03.531 Line:

rintEndpointInfo [CM505003]: Provider:[Messagenet] Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [alpha] Transport: [sip:192.168.0.97:5061]
19:27:03.531 LineCfg::getInboundTarget [CM503011]: Inbound out-of-office hours' rule for LN:10000 forwards to DN:
19:27:03.500 CallCtrl:

nIncomingCall [CM503001]: Call(28): Incoming call from +3902123456@(Ln.10000@Messagenet) to [sip:www.dominio.it:5061]
19:27:03.281 LineCfg::getInboundTarget [CM503011]: Inbound out-of-office hours' rule for LN:10000 forwards to DN:
Per la privacy ho variato il dominio e il nr. di tel del chiamante.
Qualche idea?
Grazie