[Asterisk-Users] Asterisk + Sip phones on Nat

[Chris Hariga]

Hi,   I install * and is working fine. I have 3 FXO cards w/ 3 phone lines. All the phones are SIP phones (Grandstream). The SIP phones from the same LAN w/ Asterisk are working but on the external phones (from the Internet) I don’t have sound. All the Grandstream phones from the Internet are register from different locations behind a NAT. All the sip users are register on * but the main issue is with sound L. My * server is directly connected to the Internet and no firewall on interfaces (eth0 to Internet and eth1 masquerade for my LAN). What do you recommend me to do? To install stun, ser, I need some solutions?   Best regards,   Chris HARIGA   P.S.: I would prefer a simple and stable solution…