Hi all, I have very easy (easy for you :]) question. Let me describe in short the setup. FreeSWITCH installed on local network computer. No extra functions are required, I will just install FS, create users in directory and then need capability to make call with users inside same internal network, as well as with clients on Internet which will be logged/registered on same PBX. External IP is changing in time, but my router have UPnP capability and I also redirect all incoming traffic to this PBX. Users place calls from mobile clients (Linphone). I have two issues: 1] Internally everything works fine (from internal to internal). I have problem with clients registered from Internet, who cant call anyone else (mailbox, IVR, echo test, ... is OK). Error message in FS states USER_NOT_REGISTERED and "Client busy" on side of caller. I try couple of things/setup in vars.xml but still nothing helped me (external_rtp_ip, external_sip_ip). Does anyone have working example? 2] Which is in relation with problem "1". External IP of my router is changing with almost every restart of my router. Is there some recommendation how FS can check, from time to time, current IP and change setup accordingly? I can also write script which will check current IP, rewrite config and restart FS if needed, but if something already exist, why reinvent the wheel :] If this is described already (I was unsuccessful on google), please just send me a link. Thank you very much! — Martin Čmelík