VoIP NAT: Difference between revisions
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*Disable UPnP on routers
*Disable SIP ALG on the router (or try enabling) See [[Disable SIP ALG]]
*If the VoIP phone has a config setting to enter your external/public IP address, then enter the address of your router's WAN port
*Disable Stun settings on the VoIP phone,
*Enter firewall rules on the router to allow UDP traffic from our VoIP servers to your VoIP phone. See [[VoIP Firewall]]
If you have 2 similar VoIP phones behind a router using NAT, you will have to change the port settings on one phone.
The local SIP port (often 5060) and the local RTP port(s) can't be the same on the 2 phones - if they are the same, you'll
get weirdness on incoming calls.
If NAT works, then well done, but if not we cannot guarantee to be able to make it work. We can provide broadband lines with constant quality monitoring and public IPs that can be used for VoIP - even multiple lines through different back-haul suppliers for extra resilience. Do speak to us.
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