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VoIP NAT: Difference between revisions
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*'''Enable Stun''' settings on the VoIP phone, or disable stun it - stun.aa.net.uk can be used as the server name
*Enter firewall rules on the router to allow UDP traffic from our VoIP servers to your VoIP phone. See [[VoIP Firewall]] - usually not needed for NAT, but needed if you have public IPs
* Avoid ISPs that do CGNAT - that is NAT within their own network. - Having multiple levels of NAT between your handset and our service can cause problems in practice. Ask your ISP to provided you with a public IP address and no CGNAT.
If you have two similar VoIP phones behind a router using NAT, you may have to change the port settings on one phone.
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